Simulate the effect of updates on a subscription without actually applying them.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
immediately, scheduled immediately, next_invoice pro_rata, pay_in_full, do_not_charge Add a new product to bill as part of the subscription.
The date when the update should be applied. Required when application_schedule is 'scheduled'.
"2024-12-20T16:04:11Z"
Simulation results