Request body for a one-shot media upload (JSON, base64).
| Property | Type | Description |
|---|---|---|
| additional_owners | String | Comma-separated user IDs that may also use this media. |
| media | String | The media file content, base64-encoded. |
| media_category | String | `tweet_image`, `tweet_video`, `tweet_gif`, `dm_image`, `dm_video`, `dm_gif` or `subtitles`. |