Calling a web api from another web api, after 110 seconds waiting my action fires again. Any ideas how to avoid that?

I have a Web Api 2 it is calling another Web Api. The scenario is simple, I am uploading a file from Angular.Js. then Angular calls a web api, this web api calls another web api. The last web api takes 2 minutes to respond, so when the first web api times out (after 110 seconds), it is fired again. I have reproduced this issue in a clean environment and it is something that comes with Web Api. The problem it is I don't know how to tell my web api, I need more time to receive the answer from my request, any ideas? This is the first web api action, it doesn't help a lot but...

    [HttpPost]
    [MultipartContentValidator]
    [ActionName("uploadfile")]      
    // POST /api/documents/uploadfile?folderId={folderId}&assetId={assetId}
    public async Task<HttpResponseMessage> UploadFile(int folderId, int assetId)
    {
        IExternalWebApiCaller _caller = new ExternalWebApiCaller();
        //## If it is not multipart, we throw it away
        if (!Request.Content.IsMimeMultipartContent("form-data"))
        {
            throw new HttpResponseException(HttpStatusCode.BadRequest);
        }

        //## Getting the juice in memory instead of the harddrive
        var provider = await Request.Content.ReadAsMultipartAsync<InMemoryMultipartFormDataStreamProvider>(new InMemoryMultipartFormDataStreamProvider());

        //## We get access to the data
        NameValueCollection formData = provider.FormData;

        //## It will access to the files
        IList<HttpContent> files = provider.Files;

        //## Reading a file as bytearray and creating the model
        //## with the filename and stuff...if any
        if (files != null)
        {
            HttpContent filetobeuploaded = files[0];
            byte[] filebytearray = await filetobeuploaded.ReadAsByteArrayAsync();

            DocumentUploadViewModel model = new DocumentUploadViewModel();
            model.AssetId = assetId;
            model.FolderId = folderId;
            model.Data = filebytearray;
            model.Filename = filetobeuploaded.Headers.ContentDisposition.FileName.Replace("\"", "");

            return await _caller.CallWebApiHttpResponseMessage("api/document/uploadfile", HttpMethod.Post, null, model, GetHeaders());
        }
        else
        {
            //## Something fail (file with no content), so we kick this out
            throw new HttpResponseException(HttpStatusCode.NoContent);
        }
    }