{
  "manageEntity": {
    "action": "Save",
    "entityId": "171409",
    "entityType": "Track",
    "nonce": "0x388109077eb08968ff9401ff4867c02cd5d88afdc75ef1b3e9b6c22d8ec2387b",
    "signature": "0x4d456fcc79fbe302701699f2412028bcea4973966fa92d96cd2b75f1f8059d0151575588d66f182d90e45d1e9de694fa0937f9a2900b94202dcc72b6589f130d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}