{
  "_notice": "Illustrative local fixture. Not live network or market data.",
  "schema_version": "1.0",
  "asset_key": "illustrative-network:example-asset",
  "source_id": "local-fixture",
  "observation_type": "illustrative-quantity",
  "value": "1250000",
  "unit": "example-base-units",
  "observed_at": "2025-11-20T10:00:00Z",
  "received_at": "2025-11-20T10:00:03Z",
  "quality": "illustrative"
}