### Mass Webhooks
These webhooks are sent when a mass change of entities is performed. The
payload contains a json serialized list of IDs of changed entities.
Purpose of these webhooks is to downgrade number of requests, while i.e.
administrator performs mass change of orders status at once etc.
So instead of emitting one event for every order, we emit one event for all
of them.
<strong>For now, if some mass event is performed, we also sent "single"
webhook event for every updated entity as usual, but it will be changed in
future</strong>,
so please watch [release changes](https://developers.shoptet.com/category/api/) for more info
| Value | Description | Identifier meaning |
|  --- | --- | --- |
| category:massCreate | Mass create of product categories event | Json serialized list of string (`guid`) of product categories |
| category:massUpdate | Mass change of product categories event | Json serialized list of string (`guid`) of product categories |
| category:massDelete | Mass delete of product categories event | Json serialized list of string (`guid`) of product categories |
| discountCoupon:massCreate | Mass create of discount coupons event | Json serialized list of string (`code`) of discount coupons |
| discountCoupon:massDelete | Mass delete of discount coupons event | Json serialized list of string (`code`) of discount coupons |
| invoice:massUpdate | Mass change of invoices event | Json serialized list of number (`code`) of invoices |
| order:massCreate | Mass create of orders event | Json serialized list of number (`code`) of orders |
| order:massUpdate | Mass change of orders event | Json serialized list of number (`code`) of orders |
| order:massPaid | Mass paid of orders event. Not emitted if a new mass orders with paid status are created (register `order:create`/`order:massCreate`). Emitted only if the unpaid state is changed to paid during mass orders update. | Json serialized list of number (`code`) of orders |
| quantityDiscount:massDelete | Mass delete of quantity discount event | Json serialized list of quantity discounts IDs |
| quantityDiscount:massUpdate | Mass change of quantity discount event | Json serialized list of quantity discounts IDs |