{
  "manageEntity": {
    "action": "Save",
    "entityId": "544639237",
    "entityType": "Track",
    "nonce": "0x8b90203bf14ee2f2d1898b834754dcc59286a6e0f763a1f4ef07f30961a6dea6",
    "signature": "0x1fb47dfdcbb18ca6a451f32902b7d0c8ff762e84d56d7f8f8accd1b97905c2f922dd69e115cffee101f75361f6f7e5c6aa75a619fbbeafe8dbb84597b841ae6e1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}