{
  "@context": "https://www.w3.org/ns/activitystreams",
  "id": "https://example.com/collection/unordered_array",
  "summary": "Object history",
  "type": "Collection",
  "totalItems": 2,
  "items": [
    {
      "type": "Create",
      "actor": "http://www.test.example/sally",
      "object": "http://example.org/foo"
    },
    {
      "type": "Like",
      "actor": "http://www.test.example/joe",
      "object": "http://example.org/foo"
    }
  ]
}