{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50737590",
    "entityType": "User",
    "nonce": "0xb034928126c0993be6300df98d59e0ac349ff6d47d3b460951f1c62bd5f9224d",
    "signature": "0x9016fc47c305ef288aeeb806b8427ae2782a37a3cd1748f66579ac94332abf7377063595608eadff6530eca937519dd231621567d698fb18e2aeccf134626e251c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}