anchor.diff:  ### Normalized mode [POST /v2/entities]
   
   + Request (application/json)
  -
  -        {
  -            "type": "Room",
  -            "id": "Bcn-Welt",
  -            "temperature": {
  -              "value": 21.7,
  -              "metadata": {
  -                 "unitCode": {
  -                    "value": "CEL"
  -                 }
  -              }
  -            },
  -            "humidity": {
  -              "value": 60    
  -            },
  -            "address": {
  -              "value": {
  -                "addressCountry":  "ES",
  -                "addressLocality": "Barcelona",
  -                "streetAddress":   "Diagonal 00"             
  -              },
  -              "type": "PostalAddress"
  -            }
  -        }
  +    
  +    + Headers
  +
  +            Fiware-Service: tourguide
  +
  +    + Body
  +
  +            {
  +                "type": "Review",
  +                "id": "review-Elizalde-34",
  +                "author": {
  +                  "type":"Person",
  +                  "value": "Client1234"
  +                },
  +                "itemReviewed": {
  +                  "type": "Restaurant",
  +                  "value": ""    
  +                },
  +                "reviewBody": {
  +                  "value": "Cheap and nice place to eat."
  +                },
  +                "reviewRating":{
  +                  "type": "Rating",
  +                  "value": 4
  +                }
  +            }
         
   + Response 201 (application/json)
   
       + Headers
   
  -            Location: /v2/entities/Bcn-Welt?type=Room
  +            Location: /v2/entities/review-Elizalde-34?type=Review
   
   
   ### keyValues mode [POST /v2/entities{?options}]
  
positive.code: ### Update [PUT /v2/entities/{entityId}/attrs/{attrName}]
  
  + Parameters
      + entityId: Bcn_Welt (required, string) - Entity ID
      + attrName: temperature (required, string) - Attribute name.
  
  + Request (application/json)
  
          {
              "value": 25.0,
              "metadata": {
                 "unitCode": "CEL"
              }
          }
  
  + Response 200
  
  
negative.code: ### Update. Normalized mode. [PATCH /v2/entities/{entityId}]
  
  + Parameters
      + entityId: SampleRestaurant (required, string) - Entity ID
  
  + Request (application/json) 
      
      + Headers
  
              Fiware-Service: tourguide
              
      + Body
  
              {
                 "priceRange": {
                     "value": 12
                 },
                 "capacity": {
                     "type": "propertyValue",
                     "value": 100
                 }
              }
  
  + Response 204
  