{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885183433",
    "entityType": "Track",
    "nonce": "0xb6724e10c5261a219249e5b684b2b542e1de971d00039c7c105696cc547e0dfd",
    "signature": "0x2a461169137033cbb05e31a0cd64281bf8d69a0b9a652ca2a9629647ea5b5b363857356bd1d332a93eea5001a769bb5f5074f03b62599dc1765e94a870cfb6ad1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}