curl --request POST \
  --url https://api.ruxa.ai/api/v1/tasks/create \
  --header 'Authorization: Bearer sk-xxxxxx' \
  --header 'Content-Type: application/json' \
  --data '{
    "callback_url": "https://your-domain.com/api/callback",
    "input": {
      "prompt": "把背景变成像素风",
      "output_format": "png",
      "aspect_ratio": "16:9",
      "image_input": ["https://file.aiquickdraw.com/custom-page/akr/section-images/1756223420389w8xa2jfe.png"]
    },
    "model": "google/nano-banana"
  }'

{
  "code": 200,
  "message": "success",
  "data": {
    "taskId": "task_gemini-2.5-flash-image_1766304530229_cf4dafd2"
  }
}