{
  "description": "Empty request.imp[0].audio.mimes array",
  "mockBidRequest": {
    "id": "req-id",
    "imp": [
      {
        "id": "imp-id",
        "audio": {
          "mimes": []
        }
      }
    ],
    "app": {
      "id": "app_001"
    }
  },
  "expectedReturnCode": 400,
  "expectedErrorMessage": "Invalid request: request.imp[0].audio.mimes must contain at least one supported MIME type\n"
}