{
  "@context": "https://local-loop-io.github.io/projects/loop-protocol/contexts/loop-v0.2.0.jsonld",
  "@type": "MaterialStatusUpdate",
  "schema_version": "0.2.0",
  "id": "3c9a6a0b-8c1a-4d3f-9c2c-3c1c2f9d5c2a",
  "material_id": "MAT-DE-MUC-2025-PLASTIC-B847F3",
  "status": "reserved",
  "updated_at": "2025-06-03T09:15:00Z",
  "reason": "Reserved by city exchange",
  "notes": "Holding until pickup is confirmed",
  "source_node": "lab-hub.loop",
  "metadata": {
    "ticket": "LAB-42"
  }
}