{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "645720561",
    "entityType": "User",
    "nonce": "0x542f579aff4a22e9b6ebebb4cd564ec74d8562ab34dd723988500e1fcc6d6eda",
    "signature": "0x3d096bd30e266c16a0db0d6c2706a17ded30ea974affa08b1622351efedfb2a701b3854ae8162775721adac6288ab90d43661f6d3d8a634f0e93d7061c4604fa1c",
    "signer": "0x27eB4b469aE053b72c26B3e9c68a655390Fe24fB",
    "userId": "42216"
  }
}