Implement update endpoint

MediaBrowser.Model/Playlists/PlaylistUpdateRequest.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using MediaBrowser.Model.Entities;
+
+namespace MediaBrowser.Model.Playlists;
+
+/// <summary>
+/// A playlist creation request.
+/// </summary>
+public class PlaylistUpdateRequest
+{
+    /// <summary>
+    /// Gets or sets the id of the playlist.
+    /// </summary>
+    public Guid Id { get; set; }
+
+    /// <summary>
+    /// Gets or sets the id of the user updating the playlist.
+    /// </summary>
+    public Guid UserId { get; set; }
+
+    /// <summary>
+    /// Gets or sets the name of the playlist.
+    /// </summary>
+    public string? Name { get; set; }
+
+    /// <summary>
+    /// Gets or sets item ids to add to the playlist.
+    /// </summary>
+    public IReadOnlyList<Guid>? Ids { get; set; }
+
+    /// <summary>
+    /// Gets or sets the playlist users.
+    /// </summary>
+    public IReadOnlyList<PlaylistUserPermissions>? Users { get; set; }
+
+    /// <summary>
+    /// Gets or sets a value indicating whether the playlist is public.
+    /// </summary>
+    public bool? Public { get; set; }
+}