1. {
2.   "contexts": {
3.     "comment:student:$STUDENT_ID$": {
4.       "board": "r",
5.       "post": "crud",
6.       "reply": "crud"
7.     },
8.     "comment:book:$BOOK_ID$": {
9.       "board": "crudm",
10.       "post": "crudm",
11.       "reply": "crudm"
12.     }
13.   }
14. }