curl --request POST \
  --url https://api.highwayapi.ai/v3/async/wan2.6-v2v \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: <content-type>' \
  --data '
{
  "input": {
    "prompt": "<string>",
    "reference_urls": [
      {}
    ],
    "negative_prompt": "<string>"
  },
  "parameters": {
    "seed": 123,
    "size": "<string>",
    "duration": 123,
    "shot_type": "<string>",
    "watermark": true,
    "prompt_extend": true
  }
}
'

{
  "task_id": "<string>"
}