def METHOD_NAME(self) -> str:
    params = json.loads(self.body)
    trail_name = params.get("TrailName")
    event_selectors = params.get("EventSelectors")
    advanced_event_selectors = params.get("AdvancedEventSelectors")
    (
        trail_arn,
        event_selectors,
        advanced_event_selectors,
    ) = self.cloudtrail_backend.METHOD_NAME(
        trail_name=trail_name,
        event_selectors=event_selectors,
        advanced_event_selectors=advanced_event_selectors,
    )
    return json.dumps(
        dict(
            TrailARN=trail_arn,
            EventSelectors=event_selectors,
            AdvancedEventSelectors=advanced_event_selectors,
        )
    )