Create a Case Activity
post
                    /cases/{id}/activities/{activityDefinitionId}
 Creates a case activity.
                Request
Query Parameters
                                - action
 - 
                                            
Action performed
- comment
 Optional comment- relevance
 Relevance 
Response
Supported Media Types
                                - application/json
 - application/xml
 
200 Response 
                                
                                    Success
                                
                                
                                
                                
                                Body
                                    Root Schema : /paths/~1cases~1{id}~1activities~1{activityDefinitionId}/post/responses/200/schema