Required Fields

These fields are required for creating a subscription from an existing transaction:
subscriptionInformation.name
subscriptionInformation.startDate
This field is required for using an existing plan:
subscriptionInformation.planId
These fields are required for using a one-time plan:
orderInformation.amountDetails.billingAmount
orderInformation.amountDetails.currency
orderInformation.amountDetails.setupFee
planInformation.billingPeriod.length
planInformation.billingPeriod.unit