curl --request POST \
  --url https://nudgen.net/api/v1/ai/generate \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "campaignGoal": "Write a short retention email inviting users to try Nudgen."
}
'

{
  "subject": "<string>",
  "html": "<string>",
  "generationMode": "<string>"
}