Updates a reward store. Send only the fields you want to change. Requires a producer access token for the application.

Once a store is published, only name and sponsor_ids can be changed, and any other field fails with 400. Unpublish the store to edit the rest. The reward item can't be changed while any product in the store is published. A store can have at most one reward item.

reward_item_ids, sponsor_ids and attributes are full replacements. Send the complete list, and send an empty list to clear them. Omitting a field leaves it unchanged. The response is the updated store, in the same shape as Retrieve Reward Store.