{
  "manageEntity": {
    "action": "Save",
    "entityId": "312410592",
    "entityType": "Track",
    "nonce": "0x86918e302ade5160335552a94c1d75ca46fd0f3761bf49d1abf0682b34b0ea03",
    "signature": "0x65a9df8b4af5dec47322b329608ad60a3b3bfc21d5c105f1c72e0103e6b123c2588712d471a0144844359877522b9fe45f58083b40e1f5b28f160948741cdb461c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}