{
  "manageEntity": {
    "action": "Save",
    "entityId": "1464502476",
    "entityType": "Track",
    "nonce": "0x55676ca7092ffd24ee04da1b3f72bd4efe658d1cf4131f73b4ef9e5fa5678848",
    "signature": "0x82bd939a0f231efb0db02e68c186adc353028b00cfe2a8c25a161db818a0ceb535054792c35b8651d4202bb8d303d07141f10ed3bb692d0736ff3daf3e883ec41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}