diff --git a/Astral.ApiServer/Controllers/V1/UserApiController.cs b/Astral.ApiServer/Controllers/V1/UserApiController.cs
index 9652504..1ca787e 100644
--- a/Astral.ApiServer/Controllers/V1/UserApiController.cs
+++ b/Astral.ApiServer/Controllers/V1/UserApiController.cs
@@ -71,10 +71,17 @@ public class UserApiController : BaseApiController
     /// <summary>
     /// Receive a user's location heartbeat.
     /// </summary>
+    /// <param name="heartbeatModel">Instance of <see cref="HeartbeatRootRequestModel"/>.</param>
     [Authorize]
     [HttpPut("location")]
     public async Task<IActionResult> ReceiveLocation([FromBody] HeartbeatRootRequestModel heartbeatModel)
     {
+        if (heartbeatModel?.Location != null)
+        {
+            var heartbeatDto = heartbeatModel.Location.ToUserLocationHeartbeat();
+            await _userPresenceService.ConsumeLocationHeartbeat(heartbeatDto);
+        }
+
         return SuccessResult();
     }
 
diff --git a/Astral.ApiServer/Models/HeartbeatModel.cs b/Astral.ApiServer/Models/HeartbeatModel.cs
index f2a3c21..85c5299 100644
--- a/Astral.ApiServer/Models/HeartbeatModel.cs
+++ b/Astral.ApiServer/Models/HeartbeatModel.cs
@@ -3,6 +3,7 @@
 // </copyright>
 
 using System.Text.Json.Serialization;
+using Astral.Services.Dtos;
 
 namespace Astral.ApiServer.Models;
 
@@ -15,7 +16,7 @@ public class HeartbeatModel
     /// True if connected.
     /// </summary>
     [JsonPropertyName("connected")]
-    public bool Connected { get; set; }
+    public bool? Connected { get; set; }
 
     /// <summary>
     /// Path.
@@ -27,13 +28,13 @@ public class HeartbeatModel
     /// Domain id.
     /// </summary>
     [JsonPropertyName("domain_id")]
-    public Guid DomainId { get; set; }
+    public string DomainId { get; set; }
 
     /// <summary>
     /// Place id.
     /// </summary>
     [JsonPropertyName("place_id")]
-    public Guid PlaceId { get; set; }
+    public string PlaceId { get; set; }
 
     /// <summary>
     /// Network address.
@@ -45,17 +46,71 @@ public class HeartbeatModel
     /// Network port.
     /// </summary>
     [JsonPropertyName("network_port")]
-    public int NetworkPort { get; set; }
+    public int? NetworkPort { get; set; }
 
     /// <summary>
     /// Node id.
     /// </summary>
     [JsonPropertyName("node_id")]
-    public Guid NodeId { get; set; }
+    public string NodeId { get; set; }
 
     /// <summary>
     /// Availability.
     /// </summary>
     [JsonPropertyName("availability")]
     public string Availability { get; set; }
+
+    /// <summary>
+    /// Convert this model to <see cref="UserLocationHeartbeatDto"/>.
+    /// </summary>
+    /// <returns>Instance of <see cref="UserLocationHeartbeatDto"/>.</returns>
+    public UserLocationHeartbeatDto ToUserLocationHeartbeat()
+    {
+        var result = new UserLocationHeartbeatDto()
+        {
+            Connected = Connected,
+            Path = Path,
+            NetworkAddress = NetworkAddress,
+            NetworkPort = NetworkPort,
+            Availability = Availability
+        };
+
+        if (!string.IsNullOrEmpty(DomainId))
+        {
+            if (Guid.TryParse(DomainId, out var guid))
+            {
+                result.DomainId = guid;
+            }
+            else
+            {
+                result.DomainId = null;
+            }
+        }
+
+        if (!string.IsNullOrEmpty(PlaceId))
+        {
+            if (Guid.TryParse(PlaceId, out var guid))
+            {
+                result.PlaceId = guid;
+            }
+            else
+            {
+                PlaceId = null;
+            }
+        }
+
+        if (!string.IsNullOrEmpty(NodeId))
+        {
+            if (Guid.TryParse(NodeId, out var guid))
+            {
+                result.NodeId = guid;
+            }
+            else
+            {
+                result.NodeId = null;
+            }
+        }
+
+        return result;
+    }
 }
diff --git a/Astral.Services/Dtos/UserLocationHeartbeatDto.cs b/Astral.Services/Dtos/UserLocationHeartbeatDto.cs
index 3154dda..6361a58 100644
--- a/Astral.Services/Dtos/UserLocationHeartbeatDto.cs
+++ b/Astral.Services/Dtos/UserLocationHeartbeatDto.cs
@@ -12,7 +12,7 @@ public class UserLocationHeartbeatDto
     /// <summary>
     /// True if connected.
     /// </summary>
-    public bool Connected { get; set; }
+    public bool? Connected { get; set; }
 
     /// <summary>
     /// Path.
@@ -22,12 +22,12 @@ public class UserLocationHeartbeatDto
     /// <summary>
     /// Domain id.
     /// </summary>
-    public Guid DomainId { get; set; }
+    public Guid? DomainId { get; set; }
 
     /// <summary>
     /// Place id.
     /// </summary>
-    public Guid PlaceId { get; set; }
+    public Guid? PlaceId { get; set; }
 
     /// <summary>
     /// Network address.
@@ -37,12 +37,12 @@ public class UserLocationHeartbeatDto
     /// <summary>
     /// Network port.
     /// </summary>
-    public int NetworkPort { get; set; }
+    public int? NetworkPort { get; set; }
 
     /// <summary>
     /// Node id.
     /// </summary>
-    public Guid NodeId { get; set; }
+    public Guid? NodeId { get; set; }
 
     /// <summary>
     /// Availability.
diff --git a/Astral.Services/Helpers/EntityHelpers.cs b/Astral.Services/Helpers/EntityHelpers.cs
new file mode 100644
index 0000000..a5ba048
--- /dev/null
+++ b/Astral.Services/Helpers/EntityHelpers.cs
@@ -0,0 +1,37 @@
+// <copyright file="EntityHelpers.cs" company="alveus.dev">
+// Copyright (c) alveus.dev. All rights reserved. Licensed under the MIT License.
+// </copyright>
+
+namespace Astral.Services.Helpers;
+
+/// <summary>
+/// Entity helpers.
+/// </summary>
+public static class EntityHelpers
+{
+    /// <summary>
+    /// Apply changes only when new entity property is different and not null.
+    /// </summary>
+    /// <param name="oldEntity">Old entity to compare against.</param>
+    /// <param name="newEntity">New entity with new values.</param>
+    /// <typeparam name="TEntity">The type of entity to compare.</typeparam>
+    /// <returns>The new entity with changes applied.</returns>
+    public static TEntity ApplyChanges<TEntity>(TEntity oldEntity, TEntity newEntity)
+    {
+        var entityType = typeof(TEntity);
+        var properties = entityType.GetProperties();
+        foreach (var property in properties)
+        {
+            if (property.GetValue(newEntity) != null && property.GetValue(newEntity) != property.GetValue(oldEntity))
+            {
+                property.SetValue(oldEntity, property.GetValue(newEntity));
+            }
+            else
+            {
+                property.SetValue(oldEntity, property.GetValue(oldEntity));
+            }
+        }
+
+        return oldEntity;
+    }
+}
diff --git a/Astral.Services/Profiles/AutomapperProfile.cs b/Astral.Services/Profiles/AutomapperProfile.cs
index fef364d..9c9e6f5 100644
--- a/Astral.Services/Profiles/AutomapperProfile.cs
+++ b/Astral.Services/Profiles/AutomapperProfile.cs
@@ -2,6 +2,7 @@
 // Copyright (c) alveus.dev. All rights reserved. Licensed under the MIT License.
 // </copyright>
 
+using Astral.Core.Constants;
 using Astral.Core.Entities;
 using Astral.Services.Dtos;
 using AutoMapper;
@@ -31,5 +32,20 @@ public class AutomapperProfile : Profile
             .ForMember(dest => dest.Title, opt => opt.MapFrom(src => src.Title))
             .ForMember(dest => dest.Description, opt => opt.MapFrom(src => src.Description))
             .ForMember(dest => dest.Internal, opt => opt.MapFrom(src => src.Internal));
+
+        CreateMap<UserLocationHeartbeatDto, UserPresence>()
+            .ForMember(
+                dest => dest.Availability,
+                opt => opt.MapFrom((src, dest) =>
+                    Enum.TryParse(src.Availability, true, out Discoverability discoverability)
+                        ? discoverability
+                        : Discoverability.None))
+            .ForMember(dest => dest.Connected, opt => opt.MapFrom(src => src.Connected))
+            .ForMember(dest => dest.Path, opt => opt.MapFrom(src => src.Path))
+            .ForMember(dest => dest.DomainId, opt => opt.MapFrom(src => src.DomainId))
+            .ForMember(dest => dest.NetworkAddress, opt => opt.MapFrom(src => src.NetworkAddress))
+            .ForMember(dest => dest.NetworkPort, opt => opt.MapFrom(src => src.NetworkPort))
+            .ForMember(dest => dest.NodeId, opt => opt.MapFrom(src => src.NodeId))
+            .ForMember(dest => dest.PlaceId, opt => opt.MapFrom(src => src.PlaceId));
     }
 }
diff --git a/Astral.Services/Services/UserPresenceService.cs b/Astral.Services/Services/UserPresenceService.cs
index a53fb05..10d8a4e 100644
--- a/Astral.Services/Services/UserPresenceService.cs
+++ b/Astral.Services/Services/UserPresenceService.cs
@@ -8,7 +8,9 @@ using Astral.Core.RepositoryInterfaces;
 using Astral.Services.Constants;
 using Astral.Services.Dtos;
 using Astral.Services.Exceptions;
+using Astral.Services.Helpers;
 using Astral.Services.Interfaces;
+using AutoMapper;
 using Injectio.Attributes;
 
 namespace Astral.Services.Services;
@@ -20,6 +22,7 @@ public class UserPresenceService : IUserPresenceService
     private readonly IIdentityProvider _identityProvider;
     private readonly ICryptographyService _cryptographyService;
     private readonly IUserPresenceRepository _userPresenceRepository;
+    private readonly IMapper _mapper;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="UserPresenceService"/> class.
@@ -27,14 +30,17 @@ public class UserPresenceService : IUserPresenceService
     /// <param name="identityProvider">Instance of <see cref="IIdentityProvider"/>.</param>
     /// <param name="cryptographyService">Instance of <see cref="ICryptographyService"/>.</param>
     /// <param name="userPresenceRepository">Instance of <see cref="IUserPresenceRepository"/>.</param>
+    /// <param name="mapper">Instance of <see cref="IMapper"/>.</param>
     public UserPresenceService(
         IIdentityProvider identityProvider,
         ICryptographyService cryptographyService,
-        IUserPresenceRepository userPresenceRepository)
+        IUserPresenceRepository userPresenceRepository,
+        IMapper mapper)
     {
         _identityProvider = identityProvider;
         _cryptographyService = cryptographyService;
         _userPresenceRepository = userPresenceRepository;
+        _mapper = mapper;
     }
 
     /// <inheritdoc />
@@ -52,6 +58,7 @@ public class UserPresenceService : IUserPresenceService
         {
             heartbeat = new UserPresence()
             {
+                CreatedAt = DateTime.UtcNow,
                 Id = userId,
                 LastHeartbeat = DateTime.UtcNow
             };
@@ -68,7 +75,27 @@ public class UserPresenceService : IUserPresenceService
     /// <inheritdoc />
     public async Task ConsumeLocationHeartbeat(UserLocationHeartbeatDto heartbeat)
     {
-        throw new NotImplementedException();
+        var userId = _identityProvider.GetUserId();
+
+        if (userId == Guid.Empty)
+        {
+            throw new UnauthorizedException();
+        }
+
+        var newHeartbeat = _mapper.Map<UserPresence>(heartbeat);
+        newHeartbeat.Id = userId;
+
+        var oldHeartbeat = await _userPresenceRepository.FindByIdAsync(userId) ?? new UserPresence()
+        {
+            CreatedAt = DateTime.UtcNow,
+            Id = userId
+        };
+        newHeartbeat.CreatedAt = oldHeartbeat.CreatedAt;
+        newHeartbeat.UpdatedAt = oldHeartbeat.UpdatedAt;
+        newHeartbeat.LastHeartbeat = oldHeartbeat.LastHeartbeat;
+        newHeartbeat = EntityHelpers.ApplyChanges(oldHeartbeat, newHeartbeat);
+
+        await _userPresenceRepository.UpdateAsync(newHeartbeat);
     }
 
     /// <inheritdoc />