Obtain the entire http Request including headers prior to a request being sent to the server

Question

I can obtain the details of my http request including headers via Fiddler, however I'd like to display the value of my http request and response as part of my MVC web service to ensure the request is valid.

I want to return all of the details of the request as a string so I can return the result to the View for this specific controller.

I am using C# to create the request:

    var _httpClientManager = new HttpClientManager(_httpClientPool, _Identity, _errorLogger);
    _httpClientManager.HttpRequestHeaders = new Dictionary<string, string>();
    _httpClientManager.HttpRequestHeaders.Add("Accept", "application/json");

    ... extra headers omitted.....

    ... url and request JSON is omitted

    var response = await _httpClientManager.PostAsJsonAsync<IdentityVerificationRequest>(url, request, null);
    return View(response);

Basically I'd like to obtain what I am about to Post to the server and include that in the View response.

Its probably a bit of a naïve question, I am quite new working with this.

Is it possible?

Thankyou.