ILRD

[Serializable]
    public class ImpressionDataModel
    {
    public string ad_unit_id;
    public string adType;
    public string currency;
    public string revenue;
    public string revenueUSD;
    public string precision;
    public NetworkData network;
    }

[Serializable]
    public class NetworkData
    {
    public string name;
    public string ad_unit_id;
    }

    class ExampleBannerAdEventListener : BannerAdEventListener {
      // ...
      private void HandleImpression(object sender, ImpressionData impressionData) =>
        {
        var data = impressionData == null ? "null" : impressionData.rawData;

        try
        {
            var parsedData = Newtonsoft.Json.JsonConvert.DeserializeObject<ImpressionDataModel>(data);

            var adUnitId = parsedData.ad_unit_id;
            var adType = parsedData.adType;
            var currency = parsedData.currency;
            var revenue = parsedData.revenue;
            var revenueUSD = parsedData.revenueUSD;
            var precision = parsedData.precision;
            var networkName = parsedData.network.name;
            var networkAdUnitId = parsedData.network.ad_unit_id;
        }
        catch (Exception ex)
        {
            Debug.LogError($"Error parsing impression data: {ex.Message}");
        }
    }
}