PRODUCT_PRICE_DISCOUNT_MANAGE PRODUCT Endpoint
  /rpc/product/?method=PRODUCT_PRICE_DISCOUNT_MANAGE  
  Object: 199. Click here for more information.  
  PARAMETERS TYPE  
  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
       
  Discount Numeric Specify a percentage, ie usually 1..100%
  MaximumVolume Numeric The number of units that this applies up to
  MinimumVolume Numeric The number of units that this applies from
  Notes Text (2000)  
  Price Numeric The id of the Price record
  Type Numeric 1=Customer Orders,2=Supplier Orders,3=Both
  RETURN  
  id