{
  "manageEntity": {
    "action": "Save",
    "entityId": "351588158",
    "entityType": "Track",
    "nonce": "0xd8e07a587142676d752d1430acf66195c85e87700a761973866ba128a7b81ae8",
    "signature": "0xe7e320e94dd0571831fb902788b8a734dbc9493eb35b4ec9d4389fbb3f12d5db00a87bbe2f8c3914658e04875db040fdf43a619c5c44933da6c6bdabf64253861b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}