Dart Freezed 配列JSONのパース

json

[ { "meta": { "id": "00d6b1a6ba53f33e", "title": "VERTeX", "genre": "ゲキマイ", "artist": "Hiro「maimai」より", "release": "2017-12-07", "bpm": 237 }, "data": { "BAS": { "level": 4, "const": 0, "maxcombo": 542, "is_const_unknown": false }, "ADV": { "level": 8.5, "const": 8.7, "maxcombo": 846, "is_const_unknown": false }, "EXP": { "level": 11.5, "const": 11.9, "maxcombo": 1352, "is_const_unknown": false }, "MAS": { "level": 13.5, "const": 13.7, "maxcombo": 2279, "is_const_unknown": false } } }, { "meta": { "id": "00e2bd0a399a0e8d", "title": "オーケー？　オーライ！", "genre": "イロドリミドリ", "artist": "五十嵐 撫子(CV:花井 美春)", "release": "2018-10-25", "bpm": 150 }, "data": { "BAS": { "level": 3, "const": 0, "maxcombo": 445, "is_const_unknown": false }, "ADV": { "level": 6, "const": 0, "maxcombo": 764, "is_const_unknown": false }, "EXP": { "level": 9, "const": 9.2, "maxcombo": 1074, "is_const_unknown": false }, "MAS": { "level": 11.5, "const": 11.7, "maxcombo": 1548, "is_const_unknown": false } } }]