{
  "manageEntity": {
    "action": "Save",
    "entityId": "63402",
    "entityType": "Track",
    "nonce": "0x89e5256aae9e8933611e6edd8d5062ca1a79a924423e0ed8d6b25235c1ebafa4",
    "signature": "0x28c4b218d2cfc87186aabecc7d0f23ff44e0c14c5ca2a84cb80e96165b18b05e4c29fd7f89ec8c8b4542d77ae85141f7035e4aa680672c61eae2b85d32b35d691b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}