{"pair":"eth/usd","currency":"ETH","atm_iv":55.71,"skew":4.05,"ts_ratio":0.9929,"spot":1617.27,"preview":true,"signed":false,"note":"Preview — ATM IV, skew, term structure only, unsigned Data cached — may be up to 60 minutes old.","preview_cached":true,"cache_max_age_minutes":60}