{
  "manageEntity": {
    "action": "Save",
    "entityId": "1514151704",
    "entityType": "Track",
    "nonce": "0x9f4f5f5f5996281d7ae8befc3c0f0732f2a21f19cd88835f33845d8bdfad86f2",
    "signature": "0x124bf3005bbeca958dc39d11d00a46d81b2613ca1f2cfb2f3fec5136d834055223872ce1576d71bfc8ea0c36c079b0878928f4c2bb12add6ae07aeeffb3706e21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}