{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "499895630",
    "entityType": "User",
    "nonce": "0xb22ec512386a5d994f36737689419082fa54ca06a1a310886bbc895e4ae05517",
    "signature": "0x8b63c59cbf0b452733a8b043ffed0340d7b598e78b6a123bcf0b5ae8aab595920e33e1d6a83efece4d2f30854556de92c8eb6b027a0a7068ca0bd464cd5611f31c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}