{
  "manageEntity": {
    "action": "Save",
    "entityId": "923386991",
    "entityType": "Track",
    "nonce": "0x750a1313e7b81ef6dc7ac1e5dc88108b67fb761dc4b1dcadc011a89a35cfc171",
    "signature": "0x8e3faa366870e6a2d7bf45a0310f77d828fdb80bda419e3b94c54ed45b850416249b99b339e41dae945f31f1965ad5be52535deeb96f3b880ed83c9a4c1627ea1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}