query ValidatePushNotification($editor: JSON!) {
  validatePushNotification(editor: $editor) {
    editor
    payload
    headers
    byteLength
  }
}

{
  "editor": "value"
}

{
  "data": {
    "validatePushNotification": {
      "editor": "value",
      "payload": "value",
      "headers": "value",
      "byteLength": 1
    }
  }
}