workflow_basic.json

{
    "trigger": {
        "url": "https://slack.com/shortcuts/Ft012KXZK1MZ/8831723c452aac3e87c6d3219bebd44c",
        "customizable_input_parameters": [
            {
                "name": "A",
                "value": "A"
            },
            {
                "name": "B",
                "value": "B"
            }
        ]
    }
}