Durable/Consumable In-App purchasable items

1. I would like to implement consumption of purchased items on server side. How could I get item type (durable or consumable) to avoid consumption of durable items?
2. What is a response https://graph.oculus.com/$APPID/consume_entitlement for durable items? I know that response for consumable item  :{"success":true}, as shown in https://developer.oculus.com/documentation/platform/latest/concepts/dg-iap/ .