{
    "incomingRequest": {
        "ortbRequest": {
            "id": "some-request-id",
            "site": {
                "page": "test.somepage.com"
            },
            "imp": [
                {
                    "id": "my-imp-id",
                    "video": {
                        "mimes": [
                            "video/mp4"
                        ]
                    },
                    "ext": {
                        "prebid": {
                            "bidder": {
                                "appnexus": {
                                    "placementId": 1
                                },
                                "districtm": {
                                    "placementId": 2
                                },
                                "rubicon": {
                                    "accountId": 1,
                                    "siteId": 2,
                                    "zoneId": 3
                                }
                            }
                        }
                    }
                }
            ],
            "user": {
                "ext": {
                    "prebid": {
                        "buyeruids": {
                            "rubicon": "explicit-rubi"
                        }
                    }
                }
            },
            "ext": {
                "prebid": {
                    "aliases": {
                        "districtm": "appnexus"
                    }
                }
            }
        },
        "usersyncs": {
            "appnexus": "implicit-appnexus",
            "rubicon": "implicit-rubi"
        }
    },
    "outgoingRequests": {
        "appnexus": {
            "expectRequest": {
                "ortbRequest": {
                    "id": "some-request-id",
                    "site": {
                        "page": "test.somepage.com"
                    },
                    "user": {
                        "buyeruid": "implicit-appnexus"
                    },
                    "imp": [
                        {
                            "id": "my-imp-id",
                            "video": {
                                "mimes": [
                                    "video/mp4"
                                ]
                            },
                            "ext": {
                                "bidder": {
                                    "placementId": 1
                                }
                            }
                        }
                    ]
                }
            },
            "mockResponse": {
                "errors": [
                    "appnexus-error"
                ]
            }
        },
        "rubicon": {
            "expectRequest": {
                "ortbRequest": {
                    "id": "some-request-id",
                    "site": {
                        "page": "test.somepage.com"
                    },
                    "user": {
                        "buyeruid": "explicit-rubi"
                    },
                    "imp": [
                        {
                            "id": "my-imp-id",
                            "video": {
                                "mimes": [
                                    "video/mp4"
                                ]
                            },
                            "ext": {
                                "bidder": {
                                    "accountId": 1,
                                    "siteId": 2,
                                    "zoneId": 3
                                }
                            }
                        }
                    ]
                }
            },
            "mockResponse": {
                "errors": [
                    "appnexus-error"
                ]
            }
        },
        "districtm": {
            "expectRequest": {
                "ortbRequest": {
                    "id": "some-request-id",
                    "site": {
                        "page": "test.somepage.com"
                    },
                    "user": {
                        "buyeruid": "implicit-appnexus"
                    },
                    "imp": [
                        {
                            "id": "my-imp-id",
                            "video": {
                                "mimes": [
                                    "video/mp4"
                                ]
                            },
                            "ext": {
                                "bidder": {
                                    "placementId": 2
                                }
                            }
                        }
                    ],
                    "ext": {
                        "prebid": {
                            "aliases": {
                                "districtm": "appnexus"
                            }
                        }
                    }
                }
            },
            "mockResponse": {
                "errors": [
                    "districtm-error"
                ]
            }
        }
    },
    "response": {
        "bids": {
            "id": "some-request-id",
            "ext": {
                "errors": {
                    "appnexus": [
                        "appnexus-error"
                    ],
                    "districtm": [
                        "districtm-error"
                    ]
                }
            }
        }
    }
}