curl --request POST \
  --url https://app.autoposting.ai/api-proxy/clips/{clipId}/generate-caption \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "candidateId": "cand_01"
}
'

{
  "success": true,
  "data": {}
}