{
  "manageEntity": {
    "action": "Save",
    "entityId": "326394",
    "entityType": "Track",
    "nonce": "0x1600485bb83f9e576c07b75517f457fbd581300dfdb261ab24183213d3f416ec",
    "signature": "0xa6a0a8c9be2fbf0cf811ce6aa95c0f943b964ff4837dced4bbda5bd106c9b0781a7b687c2c341ad23455dbf529b5ef8e7c2c1b8807ca169f1754268390cd170d1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}