{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114038310",
    "entityType": "Track",
    "nonce": "0x9187f77b134a2e19f36939296d7e47b5c8ab997f7377869cd2532d1a7aab7691",
    "signature": "0x2c882117f034890b3e1c22efd930fd2a627959f50551b6b823f15ac4dff95ab3601cec84eda49d22a96393ea5d906bb852dd781b65b9bd81339a80913b7c13cb1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}