"mockBidRequest": {
    "id": "testid",
    "imp": [
      {
        "id": "123654",
        "banner": {
          "w": 320,
          "h": 250
        },
        "ext": {
          "bidder": {
            "group_id": "7819",
            "allowedAds":["allowed_ad_1, allowed_ad_2"]
          }
        }
      }
    ],
    "app": {
      "domain": "www.example.com"
    }
  },

  "httpCalls": [
    {
      "expectedRequest": {
        "uri": "https://pbs.nextmillmedia.com/openrtb2/auction",
        "body":{
          "id": "testid",
          "app": {
            "domain": "www.example.com"
          },
          "ext": {
            "nextMillennium": {
              "allowedAds":["allowed_ad_1, allowed_ad_2"],
              "nm_version":"v1.0.1"
            },
            ```
            ----------------------------------------------------------
            ```
            type nmExtNMM struct {
	NmmFlags       []string `json:"nmmFlags,omitempty"`
	AdSlots        []string `json:"adSlots,omitempty"`
	AllowedAds     []string `json:"allowedAds,omitempty"`
	ServerVersion  string   `json:"server_version,omitempty"`
	AdapterVersion string   `json:"nm_version,omitempty"`
}