{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "123395122",
    "entityType": "User",
    "nonce": "0x3c69a46f2bfaa1d03b147635a6b9085a083b4fd03b9df7f4230ba15bcda442f7",
    "signature": "0x11ef163e7a66f02ba4b2923cdd41f01f437ba10dfe9baadc1bc43380aacdbc551bcbeb65a06ac78cc9ca95df44e6a57cf9ab1efb768ec29bf25443e13f63e3ab1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}