Databases: How to query nested json objects in mongodb?

02:27

3:02:18

3:29:36

1:12:04

04:12

16:40

3:05:45

2:46:15

3:36:55

3:43:31

2:38:04

3:26:43

09:15

23:10

21:10

2:03:50

2:49:11

06:51