Videoselectie toevoegen

curl --request POST \
  --url https://api.cometapi.com/kling/v1/videos/multi-elements/add-selection \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "session_id": "784914037360041984",
  "frame_index": 1,
  "points": [
    {
      "x": 0,
      "y": 1
    }
  ]
}
'

{
  "code": 123,
  "message": "<string>",
  "data": {}
}