sText数据如下：

"{"words_result_num": 13, "words_result": {"id_num": "6103241990****3117", "serial_number": "23693201240714", "ticket_num": "U098173", "seat_num": "01车002号", "time": "12:18", "date": "1452年18月04日", "name": "张小伟", "destination_station": "宝鸡站", "seat_category": "新空调软卧", "starting_station": "盐城站", "sales_station": "U", "train_num": "K419", "ticket_rates": "￥470.50元"}, "direction": 0, "log_id": 1438112916449111960, "Success": true}"

系统识别sText为string类型

如何将string类型数据转换为字典？