{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4138",
    "entityType": "User",
    "nonce": "0xdcfce9cb81873927e91f405ad57ba377ecd8973e57a177a5db6fdb8ef98c7158",
    "signature": "0xdc629aba47ed24828e84739b4d786150f9044a29819786518895547ddc882b222663cf1f2154a90edd7ea10f19861b01d798387e50a5c2a8e8c908b0aa73ddbd1c",
    "signer": "0x4FD8D9B08667CCCa706De600C8242dcEFF01d9D4",
    "userId": "392873011"
  }
}