EVENT_PRODUCT_MANAGE EVENT Endpoint
  /rpc/event/?method=EVENT_PRODUCT_MANAGE  
  Object: 328. Click here for more information.  
  Link a product to an event.  
  PARAMETERS TYPE NOTES
  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
       
  Event Numeric Mandatory. As per EVENT_MANAGE
  Notes Text (2000)  
  Product Numeric Mandatory
  RETURN  
  notes ADDED, REMOVED