curl --request POST \
  --url https://api.example.com/experimental/frames/merge \
  --header 'Content-Type: application/json' \
  --data '
{
  "frame_ids": [
    123
  ],
  "output_path": "<string>"
}
'

{
  "success": true,
  "message": "<string>",
  "output_path": "<string>"
}