{
  "manageEntity": {
    "action": "Save",
    "entityId": "1362442490",
    "entityType": "Track",
    "nonce": "0xc9479415196250b8b3069047a73d5154384a82429ce5fcf003a2def7c82bdef6",
    "signature": "0xf89ee223c0d7cec7bd1263a38bd86c5f84dda151a3c7cef2387a7e45f26385f470bc3c3cccb52f12e4fd3638686d3f9308cde393a76e312392cda66d41e2474a1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}