{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3146ce9e28c0c19c899e819f3423cf642d1b73c8aa85765086d525bd558fe54c",
    "signature": "0x8ec1187d0cda7c61993c8cd35d789673585bab8cc47da381a9ef8876c87b951d1643c11d6ea967c68c4d327c7fdadd48aa25b2a8d814658d24b7f49082b409c21b",
    "signer": "0x643a7D01c8D4d435f9263d6dE2d6C2C3352e70ed",
    "userId": "305151012"
  }
}