{
  "manageEntity": {
    "action": "Save",
    "entityId": "794361145",
    "entityType": "Track",
    "nonce": "1786729168526578563",
    "signature": "0xd8925e6ff535cb7cf8516513f07604e0ab90614f4165fae3a6b346eac62f7e4d59a78f13e305eb2a58cf80737b3811052f8f026930c84e3c6799de95de560b591c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}