curl --location --request POST 'http://dev-cn.your-api-server.com/v2/business/content/youtube-intros-v2?engine=economy&language=en&num_copies' \
--header 'content-type: application/json' \
--data-raw '{
"video_title": "string",
"hook": "string",
"tone": "string"
}'
[
null
]