curl --location --request POST 'http://dev-cn.your-api-server.com/v2/business/content/cold-emails-v2?engine=economy&language=en&num_copies' \
--header 'content-type: application/json' \
--data-raw '{
"you": "string",
"to": "string",
"goal": "string",
"scenario": "string"
}'
[
null
]