def METHOD_NAME(payload: WildValue) -> str:
    return GCI_MESSAGE_TEMPLATE.format(
        actor=payload["author"].tame(check_string),
        action="{}ed on".format(payload["event_type"].tame(check_string)),
        task_name=payload["task_definition_name"].tame(check_string),
        task_url=build_instance_url(payload["task_instance"].tame(check_int)),
    )