query GetCategoryById($categoryId: ID!) {
  GetCategoryById(categoryId: $categoryId) {
    id
    parentId
    sortNumber
    descriptions {
      categoryId
      salesChannelId
      languageId
      name
      description
      metaDescription
    }
  }
}

{
  "categoryId": "id"
}

{
  "data": {
    "GetCategoryById": {
      "id": "id",
      "parentId": "id",
      "sortNumber": 1,
      "descriptions": [
        {
          "categoryId": "id",
          "salesChannelId": "id",
          "languageId": "id",
          "name": "string",
          "description": "string",
          "metaDescription": "string"
        }
      ]
    }
  }
}