{
  "manageEntity": {
    "action": "Save",
    "entityId": "1875769912",
    "entityType": "Track",
    "nonce": "0xb7424991bdbbd9cc15f8745ca8a8cc8f8fe22143ba152be6763ae2068dfebc53",
    "signature": "0x5eb13f2310780c6779bd852cc2617618c43533b02f1ede48afcda8122f6f9d0a6ed8279a95c7bced8c1073d37b7de61c80911299bec4897fdb6a38c1ede143f41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}