| Name | Type | Description |
|---|---|---|
| action_text | String | |
| author_group | Boolean | |
| author_name | String | |
| author_pic_avatar | String | |
| author_premium | Boolean | |
| author_url | String | |
| challenge_id | String | |
| challenge_name | String | |
| challenge_type | MediaTopicChallengeTypeApi | |
| create_challenge | Boolean | |
| hashtag | String | |
| image | String | |
| image_aspect_ratio | Float | |
| is_new | Boolean | |
| large_image | String | |
| large_image_aspect_ratio | Float | |
| motivator_id | String | |
| portlet_title_tokens | FeedMessageToken[] | |
| required_content | MediaTopicChallengeContentTypeApi[] | |
| total_count | Integer[] |