Embed image or thumbnail information.
| Property | Type | Description |
|---|---|---|
| content_type | String | The image's media type |
| description | String | Description (alt text) for the image |
| flags | Integer | Embed media flags combined as a bitfield |
| height | Integer | Height of image |
| proxy_url | String | A proxied url of the image |
| url | String | Source url of image (only supports http(s) and attachments) |
| width | Integer | Width of image |