{
  "manageEntity": {
    "action": "Save",
    "entityId": "318923873",
    "entityType": "Track",
    "nonce": "0x322243344a6bd84de722ae9637281a54f757c42ae45baab2c3400227380dbf3d",
    "signature": "0xc581f59a9bfa0022f97adfeb06eeca6a28c0c91f5b08758b8558519fae158fb521e11beedae512b453f2571fc4c9cc0878dcc2c10aed91c92df492c7ecf12a2c1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}