class Program
    {
        private static string _apiUrl = "https://api.plumsail.com";
        private static string _actionPath = "api/v1/documents/MergePdf";
        private static string _token = "Bearer 7c063dd060d3496788b18f0e062804cd";
        private static string _data = File.ReadAllText("data.json");

        static void Main(string[] args)
        {

            var client = new RestClient(_apiUrl);
            client.AddDefaultHeader("Authorization", _token);

            var request = new RestRequest(_actionPath)
            {
                RequestFormat = DataFormat.Json
            };
            request.AddJsonBody(_data); // uses JsonSerializer

            var response = client.Post(request);
        }
	}