| Name | Type | Description | Notes |
|---|---|---|---|
| type | string | Attachment type: sticker, animated_image_share, or photo. | |
| image_url | string | Rendered image/preview URL (from attachment.media.image.src). | [optional] |
| url | string | Source URL (from attachment.url). For GIFs this is an l.facebook.com redirect. | [optional] |