{
  "manageEntity": {
    "action": "Save",
    "entityId": "670333847",
    "entityType": "Track",
    "nonce": "0xb923f4bec8ec7f213583ef78966c9522ecc92d743308d6179cd4035ff59aa5f9",
    "signature": "0x32be56eea4b1b029bd3fc62a73e12d47b25e893cac533b30b01384f45621cfc12751f11e778d01e1b1d19ad36e28f2cf7bd9aa84fb748eb1671ef40ba30579e91b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}