{
  "@context": "https://www.w3.org/ns/activitystreams",
  "type": "Article",
  "name": "article abc",
  "content": "foo bar",
  "image": "http://pic/ture.jpg",
  "attachment": [{
    "type" : "Image",
    "mediaType" : "image/png",
    "name" : "my alt text",
    "url": "http://pic/ture.jpg"
  }]
}
