{
  "manageEntity": {
    "action": "Save",
    "entityId": "1600139340",
    "entityType": "Track",
    "nonce": "0xdb8e8287e6e0b17fbaff3da6192e6951f3e6eddffc8b1132428286c5723decbd",
    "signature": "0x3c3d3554dc2be5818bb8dca6f7241058f7cc7553dfec5405f2ed9b434704044d7c705a63002f172569b24bdf75367b3c800601a677bd11f124c08d59b604b6a91b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}