{
  "manageEntity": {
    "action": "Save",
    "entityId": "1274695933",
    "entityType": "Track",
    "nonce": "0xbd6f674abfcd1790722901e2542238aa14acba2675caaa3b8282593448f02ac3",
    "signature": "0x204c7d271989e983c104ebdec6bb290b333297f03382902401861b691551327c7815ff0fe0e49979d5a5dc6864ee148cdf8e3c84c38563549965b522184ca59c1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}