Native Assets Object
| Field | Type | Details | 
|---|---|---|
| id | integer | A unique asset ID, must match one of the asset IDs in the bid request, for example,  | 
| required* | integer | Set to  | 
| title* | object | Title object for a title asset, see, Native Assets Title Object. | 
| img* | object | Image object for an image asset, see, Native Assets Image Object. | 
| video* | object | Video object for a video asset, see, Native Asset Video Object. | 
| data* | object | Data object for a data asset, see, Native Asset Data Object. | 
| link ** | object | Link object for a call to action. 
 | 
