{
  "description": "Bid request where a request.user.eids.uids array element is missing its id field",
  "mockBidRequest": {
    "id": "anyRequestID",
    "site": {
      "page": "prebid.org",
      "publisher": {
        "id": "anyPublisher"
      }
    },
    "imp": [{
      "id": "anyImpID",
      "ext": {
        "appnexus": {
          "placementId": 42
        }
      },
      "banner": {
        "format": [{
            "w": 300,
            "h": 250
          },
          {
            "w": 300,
            "h": 300
          }
        ]
      }
    }],
    "tmax": 1000,
    "user": {
      "eids": [{
        "source": "source1",
        "uids": [{}]
      }]
    }
  },
  "expectedReturnCode": 400,
  "expectedErrorMessage": "Invalid request: request.user.eids[0].uids[0] missing required field: \"id\"\n"
}