{
  "capabilities": {
    "source_types": ["file", "playlist", "http"],
    "kinds": ["audio-release", "album", "track", "playlist"],
    "media_extensions": ["mp3", "flac", "wav", "m4a"]
  },
  "selection": {
    "status": "selected",
    "kind": "album",
    "selected": {
      "type": "file",
      "source_id": "portable-library",
      "path": "/Volumes/MUSIC/audio/track01.mp3"
    },
    "selected_index": 0,
    "policy": {
      "source_priority": ["file", "playlist", "http"]
    }
  },
  "execution": {
    "status": "ready",
    "action": "open_file",
    "path": "/Volumes/MUSIC/audio/track01.mp3",
    "media_extension": "mp3"
  }
}