{
  "manageEntity": {
    "action": "Save",
    "entityId": "1591446004",
    "entityType": "Track",
    "nonce": "0xb418d09f1fc0eaf3a66d03f5cfc96662c0c8233919daaa3f696dd35736db8b2c",
    "signature": "0x810581b15367c02183f8d4ebac0d437d21b858c5f14658a7575078aadec5627c0ced40306f74a56d92fc7ad3c5cd32b8e46f00e96b695bb2a5cc6645398991b61c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}