{
  "version": "0.1",
  "sources": [
    {
      "id": "portable-library",
      "root": "@self",
      "type": "file",
      "items": [
        {
          "instance_id": "0198d41e-4c92-7abc-9c52-8e2f4c83a211",
          "path": "audio/track01.mp3",
          "canonical_identities": [
            {
              "namespace": "mb-release",
              "content_id": "abc123"
            }
          ],
          "edition_identities": [
            {
              "namespace": "label-edition",
              "content_id": "demo-deluxe-2026"
            }
          ],
          "service_identities": [
            {
              "namespace": "spotify",
              "content_id": "album:123"
            }
          ],
          "sources": [
            {
              "type": "file",
              "path": "audio/track01.mp3"
            },
            {
              "type": "playlist",
              "path": "playlists/demo.m3u"
            },
            {
              "type": "http",
              "uri": "https://media.example.test/free-nfc/demo.mp3"
            }
          ]
        }
      ]
    }
  ]
}