async def create_page_block(request: web.Request) -> web.Response:
    data: IOResult[dict, str] = \
        await FutureResult.from_value({"request": request}) \
                .bind(retrieve_request_JSON) \
                .bind(retrieve_page_by_json_key) \
                .bind(create_block) \
                .bind(extract_block_id) \
                .awaitable()
    return web.json_response(format_block_creation_result(data))

```python async def create_page_block(request: web.Request) -> web.Response: data: IOResult[dict, str] = \ await FutureResult.from_value({"request": request}) \ .bind(retrieve_request_JSON) \ .bind(retrieve_page_by_json_key) \ .bind(create_block) \ .bind(extract_block_id) \ .awaitable() return web.json_response(format_block_creation_result(data)) ```