Not able to generate template for the Map<String, Map<String, List<Map<String, String>>>>

[pratikmmohite]

{
  "items": {"1":[
      {"name": "red", "first": true, "url": "#Red"},
      {"name": "blue", "link": true, "url": "#Blue"}
  ],
"2":[
      {"name": "red", "first": true, "url": "#Red"},
      {"name": "blue", "link": true, "url": "#Blue"}
  ],
"3":[
      {"name": "green", "link": true, "url": "#Green"},
      {"name": "blue", "link": true, "url": "#Blue"}
  ]},
..... more random ids
}