post https://rest.cleverbridge.com/subscription/updatesubscriptionitemprice
Updates (or creates a preview of an update to) the price of an existing subscription. If AlignToCurrentInterval is set to true, the response returns a prorated price that will be applied to the subscription item immediately. Optionally, it also allows you adjust the quantity of a subscription item.
For XML examples and schemas, see the Additional Examples - Update Subscription Item Price.