{
  "manageEntity": {
    "action": "Save",
    "entityId": "553425995",
    "entityType": "Track",
    "nonce": "0xc1caa0e7c9188b7a20007a99ccb0e693eaedc37d14b7b57088fa2874b3cdf4de",
    "signature": "0x528d15ca299d61812ec41fe53581317605659c8b15a6dc2c82ec46f61a7f05b07434f204b356de1b3c8205a3de9d4bd59eb3202f61e758ada9ae17e91bdc00c01c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}