curl --request POST \
  --url https://identity.xmsmartlink.com/api/overseas/asset/upload/async \
  --header 'Content-Type: application/json' \
  --header 'X-Access-Token: <api-key>' \
  --data '
{
  "images": [
    "https://example.com/a.jpg"
  ],
  "asset_type": "Image",
  "callback_url": "https://your-domain.com/api/callback"
}
'

{
  "code": 123,
  "task_id": "<string>",
  "track_id": "<string>",
  "status": "<string>",
  "message": "<string>",
  "callback_url": "<string>"
}