CONTACT_PERSON_GROUP_MANAGE CONTACT Endpoint
  /rpc/contact/?method=CONTACT_PERSON_GROUP_MANAGE  
  Object: 223. Click here for more information.  
  PARAMETERS    
  DataReturn Text A comma delimited list of advanced search fields to be returned after a successful save
  Id Numeric  
  Remove Numeric Pass '1' to remove the item. You can delete by passing the id (as per usual), or by ContactPerson & Group
       
  ContactPerson Numeric Mandatory. The person to add the group to
  Group Numeric Mandatory. The group to add to the person
  Notes Text (2000)  
  Status Numeric As defined via SETUP_CONTACT_PERSON_GROUP_STATUS_MANAGE
  RETURN  
  id