addHeaderToWebhookReceiver

mutation AddHeaderToWebhookReceiver {
  addHeaderToWebhookReceiver {
    webhookReceiver {
      LastSessionId
      _HeadersCount
      _SubscriptionsCount
      _created
      _etag
      _updated
    }
  }
}

{
  "data": {
    "addHeaderToWebhookReceiver": {
      "webhookReceiver": {
        "LastSessionId": "string",
        "_HeadersCount": 1,
        "_SubscriptionsCount": 1,
        "_created": "value",
        "_etag": "string",
        "_updated": "value"
      }
    }
  }
}