Kentico Kontent Fetch Entry JSON

IDeliveryClient client = DeliveryClientBuilder
    .WithOptions(builder => builder
        .WithProjectId("6795dbb3-a7d8-0072-8f8c-0550a61f4f98")
    .UseProductionApi()
    .Build())
    .Build();
IDeliveryItemListingResponse<JObject> response = client.GetItemsAsync<JObject>(
    new EqualsFilter("system.codename", "fieldtypesentry")).GetAwaiter().GetResult();
Console.WriteLine(response.ApiResponse.Content);