anchor.diff:                "class": [ "scenario" ],
                 "properties": {
                   "names": [{ "text": "Scenario number one" }],
  -                "address": 'Here and there',
  -                "slug": 'number_one'
  +                "address": "Here and there",
  +                "slug": "number_one"
                 },
                 "links": [
                   {
  
positive.code:               "links": [
                  {
                    "rel": [ "self" ],
                    "href": "http://example.com/scenarios/scenario_one/steps/1
                  }
                ],
                "rel": [ "item" ]
  
negative.code: 
  + Parameters
      + scenario_slug (string, `scenario_one`) ... Scenario slug
      + id (required,number,`2`) ... An unique identifier of the Step.
  
  
  + Request (application/json)
  