{
  "manageEntity": {
    "action": "Save",
    "entityId": "1786229999",
    "entityType": "Track",
    "nonce": "0x0e7d5e4ac51a08c955007e3ca46c029ce0f12d74ed1c2d88812cc97409fb2fb3",
    "signature": "0xda03c728b59211552ca5610df8905c1d8ab3286ca39684ef98fcb7af9493c89205ea5d02bcbf6eb7a874523f1f3986b2d0a5739f7e547b2b248d07e1bedd99fa1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}