{
  "schema_version": "healthcare-admin.case.v2",
  "workflow_id": "payer-contract-underpayment-review",
  "data_mode": "synthetic_only",
  "human_owner": "Synthetic Underpayment evidence review owner",
  "evidence": [
    {
      "id": "fixture-1",
      "origin": "synthetic",
      "as_of": "2026-10-02",
      "description": "Invented aggregate fixture for replay; no patient or real policy data.",
      "fields": [
        "lines"
      ]
    }
  ],
  "data": {
    "lines": [
      {
        "id": "L1",
        "expected": 1000,
        "paid": 800,
        "currency": "USD",
        "contract_ref": "Synthetic contract A"
      },
      {
        "id": "L2",
        "expected": 500,
        "paid": 550,
        "currency": "USD",
        "contract_ref": "Synthetic contract A"
      }
    ]
  }
}