{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x39902c6825d520c37c9d53c10f6eb7c91b1e33f5eebf02deaee866093c540a38",
    "signature": "0x0f9177333c447269c2071a192f1d9683fcac54da0511399e708792252c59b1d33e0730c95c713854d5daa129a762a3b3bd722a574fc06aa73e2522e1cd6fcb831b",
    "signer": "0x52F331C086a11941E738a6C86d9F127E934dDEB1",
    "userId": "281470566"
  }
}