anchor.diff:                          "pages": {},
                           "language": "en"
                       },
  -                    links: {
  +                    "links": {
                           "workflows": ["1", "2"],
                           "subject_sets": ["10", "13"],
                           "owner": {
  -                            id: "2",
  -                            href: "/users/2",
  -                            type: "user"
  +                            "id": "2",
  +                            "href": "/users/2",
  +                            "type": "user"
                           }
                       }
                   }
  
positive.code:                     "metadata": {
                          "lens_type": "50mm"
                      },
                      links: {
                          "project": "1",
                          "owner": {
                              id: "4",
                              href: "/groups/4",
                              type: "user_group"
                          }
                  }]
              }
  
negative.code:                         "pages": {},
                          "language": "en"
                      },
                      "links": {
                          "workflows": ["1", "2"],
                          "subject_sets": ["10", "13"],
                          "owner": {
                              "id": "2",
                              "href": "/users/2",
                              "type": "user"
                          }
                      }
                  },{
  