curl --request GET \
  --url https://api.production.hyperoru.com/api/signals/states \
  --header 'Authorization: Bearer <token>'

{
  "states": [
    {
      "is_active": true,
      "last_value": {},
      "signal_id": 123,
      "symbol": "<string>",
      "last_checked_at": "<string>"
    }
  ]
}