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

{
  "exchange": "<string>",
  "id": 123,
  "signal_name": "<string>",
  "trigger_condition": "<unknown>",
  "created_at": "<string>",
  "description": "<string>",
  "enabled": true,
  "updated_at": "<string>"
}