OptionalextendThe number of days to extend the subscription renewal date.
extendByDays maximum: 90
OptionalextendThe reason code for the subscription-renewal-date extension.
OptionalproductThe unique identifier for the product, that you create in App Store Connect.
OptionalrequestA string that contains a unique identifier you provide to track each subscription-renewal-date extension request.
OptionalstorefrontA list of storefront country codes you provide to limit the storefronts for a subscription-renewal-date extension.
The request body that contains subscription-renewal-extension data to apply for all eligible active subscribers.
MassExtendRenewalDateRequest