| Name | Type | Description | Notes |
|---|---|---|---|
| default_image_url | Option<String> | Image mode. Catch-all image for any placement no rule matches. Required in image mode (Meta mandates a default rule). | [optional] |
| default_video_url | Option<String> | Video mode. Catch-all video for any placement no rule matches. Required in video mode. | [optional] |
| default_thumbnail_url | Option<String> | Video mode (optional). Poster image for the default video; Meta auto-generates one when omitted. | [optional] |
| rules | Vecmodels::CreateStandaloneAdRequestPlacementAssetsRulesInner | One entry per placement group you want to pin a specific asset to. |