An example of an API.AI webhook rich response for Actions on Google integration

rich_list.py

# Providing the following resposne to API.AI from a webhook produces a rich response list
# API.AI parses the messages and sends an appropriately formmated response to Actions.abs
# However, the API and Actions appear to be on different api versions currently.abs

# Therefore, in API.AI when a user selects a list object, the object's "key" is sent to API.AI
# as a user query to trigger thenext intent. In Actions, the items title is sent




list_response_data = {
    "contextOut": [],
    "data": {
        "google": {
            "expect_user_response": true,
            "is_ssml": true,
            "permissions_request": null
        }
    },
    "messages": [
        {
            "speech": "Output speech",  # this is the message required Api.AI's web interface
            "type": 0
        },

        # Below are the Actions Rich Messages
        {
            "displayText": "This is displayed on screen",
            "platform": "google",
            "textToSpeech": "Google Assistant speaks this",
            "type": "simple_response"
        },
        {
            "platform": "google",
            "title": "Awesome List",
            "type": "list_card"
            "items": [
                {
                    "description": "Choose me for item 1",
                    "image": {
                        "accessibilityText": "Item 1 image fallback",
                        "url": "http://image1.example.png"
                    },
                    "optionInfo": {
                        "key": "item_one",  # sent to API.AI as query
                        "synonyms": [
                            "first",
                            "number one", "one",
                            "top"
                        ]
                    },
                    "title": "Item One"  # sent to Actions as query
                },
                {
                    "description": "Choose me for item 2",
                    "image": {
                        "accessibilityText": "Item 2 image fallback",
                        "url": "http://image2.example.png"
                    },
                    "optionInfo": {
                        "key": "item_two,  # sent to API.AI as query"
                        "synonyms": [
                            "second",
                            "number two", "two",
                            "bottom"
                        ]
                    },
                    "title": "Item Two"  # sent to Actions as query
                }
            ]

        }
    ],
    "source": "webhook",
    "speech": "Output speech"
}

Is there a way I can direct the user to a specific URL once he clicks on Item Two?