{
  "schema_version": "1",
  "message_id": "msg-01HZXAB2D12F3G4H5J6K7L8M9N",
  "family": "coordination.request",
  "from": "did:plc:rajexamplehome",
  "to": ["did:plc:transitoperatorhome"],
  "created_at": "2026-04-05T09:05:00Z",
  "correlation_id": "req-eta-bus-42-central-stop",
  "response_mode": "inline_preferred",
  "status": "accepted",
  "body": {
    "operation": "request_service",
    "requested_capability": "transit.eta_lookup",
    "subject": {
      "kind": "transit_vehicle",
      "route_id": "42",
      "direction": "downtown"
    },
    "location": {
      "kind": "stop",
      "stop_id": "central-stop-b",
      "label": "Central Station Stop B"
    },
    "request": {
      "question": "What time will bus 42 reach Central Station Stop B?"
    }
  },
  "attachments": [],
  "transport": {
    "mode": "sealed-box",
    "ciphertext": "BASE64_CIPHERTEXT_PLACEHOLDER",
    "signature": "HEX_SIGNATURE_PLACEHOLDER"
  },
  "extensions": {
    "dina.provenance": {
      "request_origin": "user-query"
    }
  }
}