List of non-homogeneous JSON objects

response.json

{
  "items": [
    {
      "type": "HeaderWidget",
      "title": "Hello world",
      "subtitle": "Lorem ipsum"
    },
    {
      "type": "CardWidget",
      "title": "Your top visits",
      "image": "www.example.com",
      "operation": "app://purchase"
    },
    {
      "type": "ButtonWidget",
      "title": "Subscribe",
      "operation": "app://subscribe"
    }
  ]
}