To create an order, you use orders resource. Order resources are used to handle customers' payments of previously defined offers. Orders expire after 15 minutes unless the payment is captured. Payment method is required in order entity for payment but can be added in update order.
You should add
subscriptionIdparameters for recurring orders.
methodFeecauses price calculation be based on those 2 parameters and ignore the offer price. This is useful when payment has already been made by an external service and the order (and subsequent payment) need to have the same price values as in the external service.