Everything works well and good structure.

Sources/MusicBrainz/Models/Shared/Relation.swift

@@ -0,0 +1,14 @@
+import Foundation
+
+public struct Relation: Codable, Sendable {
+	public let type: String
+	public let direction: String
+	public let url: URLResource?
+	public let artist: Artist?
+	public let release: Release?
+	// Add other entities as needed
+
+	enum CodingKeys: String, CodingKey {
+		case type, direction, url, artist, release
+	}
+}