modalView.json

{
    "type": "modal",
    "title": {
        "type": "plain_text",
        "text": "Modal title"
    },
    "blocks": [
        {
            "type": "section",
            "text": {
                "type": "mrkdwn",
                "text": "It's Block Kit...but _in a modal_"
            },
            "block_id": "section1",
            "accessory": {
                "type": "button",
                "text": {
                    "type": "plain_text",
                    "text": "Click me"
                },
                "action_id": "button_abc",
                "value": "Button value",
                "style": "danger"
            }
        },
        {
            "type": "input",
            "label": {
                "type": "plain_text",
                "text": "Input label"
            },
            "element": {
                "type": "plain_text_input",
                "action_id": "input1",
                "placeholder": {
                    "type": "plain_text",
                    "text": "Type in here"
                },
                "multiline": false
            },
            "optional": false
        }
    ],
    "close": {
        "type": "plain_text",
        "text": "Cancel"
    },
    "submit": {
        "type": "plain_text",
        "text": "Save"
    },
    "private_metadata": "Shhhhhhhh",
    "callback_id": "view_identifier_12"
}