curl --request POST \
  --url https://api.orcarouter.ai/v1/asset/groups \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "Name": "actor_zhang",
  "Description": "Virtual portrait group for character Zhang"
}
'

{
  "Id": "group-20260318033332-ab12c"
}