anchor.diff:  
           {
               "_links": {
  -                "self": { "href": "/document/<id> }
  +                "self": { "href": "/documents/58ca459f-a49f-46da-8bef-4b6cc2006696" }
               }
               "_embedded": {
  -                "doc-string": "<h1>Title</h1><p>This is a paragraph.</p>",
  +                "doc-string": "<p>Updated for the document</p>",
  +                "lastUpdatedAt": "2014-12-30T09:00:23.340Z",
                   "publishedAt": "2014-11-11T08:40:51.620Z",
               }
  -        }+        }
  
positive.code: + Request (application/json)
  
          {
              "doc-string": "<p>Update for the document</p>"
          }
  
  
negative.code: 
          {
              "_links": {
                  "self": { "href": "/documents/58ca459f-a49f-46da-8bef-4b6cc2006696" }
              }
              "_embedded": {
                  "id": "58ca459f-a49f-46da-8bef-4b6cc2006696",
                  "doc-string": "<h1>Title</h1><p>This is a paragraph.</p>",
                  "publishedAt": "2014-11-11T08:40:51.620Z",
              }
  