{
  "manageEntity": {
    "action": "Download",
    "entityId": "477767",
    "entityType": "Track",
    "metadata": "{\"cid\":\"\",\"data\":{}}",
    "nonce": "0x56395ca742edb096c1476208ce43260db9cabe4e1502224213f451c208064cf8",
    "signature": "0xd26d739537022d8556df1a5a28487983a9e620a77698869cf1f452c9e7e38d0a38eb71e424fdaab1b4b9c1f44bd63207bc59d380a55c5a4c97fec307fdba328a1c",
    "signer": "0xeaeE51782bb4894387908A098D4114488f1d2585",
    "userId": "121125"
  }
}