{
  "manageEntity": {
    "action": "Save",
    "entityId": "1235344413",
    "entityType": "Track",
    "nonce": "0xf86e8ca61bc43caedc774155b752f7b603cd46a971723ed1483f609a611a4acb",
    "signature": "0x78e7903632104ccaee3c3853a05056e37175108e12434a217e1cb040e1e4158461d98de59ac6f59c588481eba05ccfc27693e22888f78784395fc3e598284c2e1c",
    "signer": "0xC56E1ccbA93c1E645e5F27Bf8A5ca13eB7A5eEbe",
    "userId": "335878078"
  }
}