如何在Rasa中获取按钮负载的JSON并将其显示在用户界面上

from typing import Any, Text, Dict, List
from rasa_sdk import Action, Tracker
from rasa_sdk.executor import CollectingDispatcher
from rasa_sdk.forms import FormAction
from rasa_sdk.events import SlotSet

class DisplayButtonAction(Action):
    def name(self) -> Text:
        return "action_display_button"

    def run(self, dispatcher: CollectingDispatcher,
            tracker: Tracker,
            domain: Dict[Text, Any]) -> List[Dict[Text, Any]]:

        button_payload = {
            "button_json_key": "button_json_value"
        }

        buttons = [
            {
                "title": "Button 1",
                "payload": button_payload
            },
            {
                "title": "Button 2",
                "payload": button_payload
            },
            {
                "title": "Button 3",
                "payload": button_payload
            }
        ]

        dispatcher.utter_message(text="Here are some buttons:", buttons=buttons)

        return []

actions:
  - action_display_button