{
  "manageEntity": {
    "action": "Save",
    "entityId": "478679019",
    "entityType": "Track",
    "nonce": "0xba0150564e3bfa56137639ec054406596145c82627e6fa2ae2255705e6a623e1",
    "signature": "0xcb6d9b5d8cc7906dbd220798d96450aab4faba00324a4890f3901dfa9831310e506f3b6ef927b886103dacde30ec44a83954460dcde22ed786706e20fcc5b4501b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}