anchor.diff:  * The entity type is specified by the object's `type` property, which value is a string containing the entity's type name.
   
   * Entity attributes are specified by additional properties, which name is the `name` of the attribute and which representation
  -  is described in the JSON Attribute Representation section below. Obviously, `id` and `type` are not allowed as attribute names.
  +  is described in the "JSON Attribute Representation" section below. Obviously, `id` and `type` are not allowed as attribute names.
   
   An example of this syntax in shown below:
   
  
positive.code: ### Replace all entity attributes [PUT /v2/entities/{entityId}/attrs{?type,options}]
  
  The request payload is an object representing the new entity attributes. The object follows
  the JSON entity representation format (described in a section above), except that `id` and `type`
  are not allowed.
  
  The attributes previously existing in the entity are removed and replaced by the ones in the
  
negative.code:     + options (optional, string) - Operations options
          + Members
              + keyValues - when used, the request payload uses `keyValues` simplified entity representation. See 
              "Simplified Entity Representation" section for details.
  
  + Request (application/json)
  
  