curl --request GET \
  --url 'https://scan.sv-1.global.canton.network.sync.global/api/scan/v1/updates/{update_id}'

{
  "update_id": "string",
  "migration_id": 0,
  "workflow_id": "string",
  "record_time": "string",
  "synchronizer_id": "string",
  "effective_at": "string",
  "offset": "string",
  "root_event_ids": [
    "string"
  ],
  "events_by_id": {},
  "external_transaction_hash": "string"
}