To be returned via both products and subscriptions API
For Purchases, this will be the order id present in the purchase.
For subscriptions, this will be the orderId associated with the most
recent recurring
order id.
New subscription cancelReason: 2. Subscription replaced
Will be returned for subscriptions which were canceled due to the user
changing subscription plans (e.g. upgrading to a new subscription plan).
This additional data will be automatically returned to you in the JSON responses
to your API calls. Please double check your integration to make sure this new
field and value will not cause any problems for you.