{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xda5e421fbde8edaa97640f391fcefd2ac8ed86bf19a38a954cf940d40b374311",
    "signature": "0xd9f5c24ea934c80759d4cbd14580723c5158dd24d11243141bdabf4b1ce5ec9d4704e7e9374d547df14a946c989c7663521f08fa2f3a9c89dcad86c96ca3b9591c",
    "signer": "0xD6E46FbCc80bDdA035b227a9dCcc9Bd9548C531a",
    "userId": "63401566"
  }
}