{
  "manageEntity": {
    "action": "Save",
    "entityId": "1454637381",
    "entityType": "Track",
    "nonce": "0xb232edd05b7f9d38acdf686510a4d6363139bd7c5345eeb4f5b9e174510a12c6",
    "signature": "0xfc089f78cd352b8bbfa1d90760d5cdf2a7119277b574652785b6044418fd68c718071d025e6266dc6adb9db054d2dc791020b5e1c2be7d21d0f6ccee303609fb1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}