make it pretty with http://jsonformatter.curiousconcept.com/

gistfile1.json

{
   "courseId":10,
   "settings":{
      "diverse":true
   },
   "students":[
      {
         "id":1,
         "name":"Bram",
         "groupPreferences":[
            2,
            4,
            1,
            3
         ],
         "friends":[
            3,
            9
         ],
         "weights":{
            "friends":4,
            "preferences":2
         }
      }
   ],
   "groups":[
      {
         "id":1,
         "minsize":3,
         "maxsize":7
      }
   ]
}