{
  "manageEntity": {
    "action": "Save",
    "entityId": "678534",
    "entityType": "Track",
    "nonce": "0xcbf78ba7583091841006cfb8cfb2f0debaff2cb48fb075c07fe2285289449bf0",
    "signature": "0xe49a99de403022281c9329d0e35f912c3138cea4541303965dbc203c06b2de2d461562f22b5a1228e85800942bfb17e7aa1057805c4d6952cb843ced627b582a1c",
    "signer": "0xb0677DDd73D11Ac9Df265c92E5B518cD9480fc96",
    "userId": "288307"
  }
}