{"database": "fitbit", "table": "heart_rate_zones", "rows": [["2015-03-31", 1320, 18, 0, 0]], "columns": ["date", "below_zone_1", "in_zone_1", "in_zone_2", "in_zone_3"], "primary_keys": ["date"], "primary_key_values": ["2015-03-31"], "units": {}, "query_ms": 0.4623519998858683}