diff --git a/Jellyfin.Data/Entities/Security/Device.cs b/Jellyfin.Data/Entities/Security/Device.cs
new file mode 100644
index 0000000000..8e8b40aa11
--- /dev/null
+++ b/Jellyfin.Data/Entities/Security/Device.cs
@@ -0,0 +1,81 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace Jellyfin.Data.Entities.Security
+{
+    /// <summary>
+    /// An entity representing a device.
+    /// </summary>
+    public class Device
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Device"/> class.
+        /// </summary>
+        /// <param name="userId">The user id.</param>
+        /// <param name="appName">The app name.</param>
+        /// <param name="appVersion">The app version.</param>
+        /// <param name="deviceName">The device name.</param>
+        /// <param name="deviceId">The device id.</param>
+        public Device(Guid userId, string appName, string appVersion, string deviceName, string deviceId)
+        {
+            UserId = userId;
+            AppName = appName;
+            AppVersion = appVersion;
+            DeviceName = deviceName;
+            DeviceId = deviceId;
+
+            DateCreated = DateTime.UtcNow;
+            DateLastActivity = DateCreated;
+        }
+
+        public int Id { get; private set; }
+
+        /// <summary>
+        /// Gets the user id.
+        /// </summary>
+        public Guid UserId { get; private set; }
+
+        /// <summary>
+        /// Gets or sets the app name.
+        /// </summary>
+        [MaxLength(64)]
+        [StringLength(64)]
+        public string AppName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the app version.
+        /// </summary>
+        [MaxLength(32)]
+        [StringLength(32)]
+        public string AppVersion { get; set; }
+
+        /// <summary>
+        /// Gets or sets the device name.
+        /// </summary>
+        [MaxLength(64)]
+        [StringLength(64)]
+        public string DeviceName { get; set; }
+
+        /// <summary>
+        /// Gets or sets the device id.
+        /// </summary>
+        [MaxLength(256)]
+        [StringLength(256)]
+        public string DeviceId { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether this device is active.
+        /// </summary>
+        public bool IsActive { get; set; }
+
+        /// <summary>
+        /// Gets the date this device was created.
+        /// </summary>
+        public DateTime DateCreated { get; private set; }
+
+        /// <summary>
+        /// Gets or sets the date of last activity.
+        /// </summary>
+        public DateTime DateLastActivity { get; set; }
+    }
+}