{"index":"MESI","value":42,"regime":"MODERATE","data_date":"2026-07-24","fetched_at":1785157824,"signed":false,"preview":true,"note":"Preview — sample data only, 3-day lag. Full real-time MESI $0.05. Data cached — may be up to 60 minutes old.","preview_cached":true,"cache_max_age_minutes":60}