Impression Ext
| Field | Type | Details | 
|---|---|---|
| wopv | str | Passes the WhiteOps MediaGuard Prediction ID, e.g.  | 
| skadn* | object | Apple Ad Network Object, this will be used to pass app data from iOS 14 and newer releases. See SkAdNetwork Extension | 
| inventory_class* | integer | Inventory class according to the Supplier classification. The Supplier classification is maintained by each Buyer and is not a The MediaGrid list, for example  | 
| notification_type* | int | Indicates the supported notification type(s): 
 | 
