如何对json进行处理得到另一形式的json

原json：
[
{"user":"A","time":"2019.07.23","exactTime":"08:37,12:00,13:34,17:02"},
{"user":"A","time":"2019.07.24","exactTime":"08:40,12:00,13:33,17:03"},
{"user":"A","time":"2019.07.25","exactTime":"08:25,13:28,17:11"},
{"user":"A","time":"2019.07.26","exactTime":"08:20,17:14"},
{"user":"B","time":"2019.07.23","exactTime":"08:37,12:04,13:37"},
{"user":"B","time":"2019.07.24","exactTime":"12:03,13:28,17:04"},
{"user":"B","time":"2019.07.25","exactTime":"08:50,11:50,14:00"}
]

想得到这样的json格式(根据时间的格式，一般 08：xx 放到Time1,12：xx 放到 Time2,13：xx 放到 Time3,17：xx 放到 Time4):
[
{"user":"A","time":"2019.07.23","Time1":"08:37","Time2":"12:00","Time3":"13:34","Time4":"17:02"},
{"user":"A","time":"2019.07.24","Time1":"08:40","Time2":"12:00","Time3":"13:33","Time4":"17:03"},
{"user":"A","time":"2019.07.25","Time1":"08:25","Time2":"","Time3":"13:28","Time4":"17:11"},
{"user":"A","time":"2019.07.26","Time1":"08:20","Time2":"","Time3":"","Time4":"17:14"},
{"user":"B","time":"2019.07.23","Time1":"08:37","Time2":"12:00","Time3":"13:34","Time4":"17:02"},
{"user":"B","time":"2019.07.24","Time1":"","Time2":"12:02","Time3":"13:28","Time4":"17:04"},
{"user":"B","time":"2019.07.25","Time1":"08:50","Time2":"11:50","Time3":"14:00","Time4":""}
]