{
  "manageEntity": {
    "action": "Save",
    "entityId": "1126784015",
    "entityType": "Track",
    "nonce": "0xe3ffe1ebe5df6663d32582aaa83b610eb45952d0ba5499360aebf0b22489c6c8",
    "signature": "0xb84e25d85a5932299c7c608a83ca3970b15705b8101a70fd06a39b7d43b4ba533ab0491b2b796b9e051232800e55d8c91abe453a6d8d99e4c31ece52da58a9f11b",
    "signer": "0x16a2B57b3b47956466fEFd44Fd9bD698EE288453",
    "userId": "944190091"
  }
}