{
  "endpoint": "getCustomer",
  "description": "Genau eine Kennung angeben",
  "request": {
    "customerId": "customer_example",
    "externalId": "shop-4711"
  },
  "expected": {
    "ok": false,
    "code": "validation",
    "fields": [
      "customerId"
    ]
  }
}