curl –X POST https://secure.fusebill.com/v1/BulkApi/Process
-H "Content-Type: application/json" \ 
-H "Authorization: Basic {APIKey}" \ 
-d "{id:123456}"

//Json Payload
string jsonData =
  "{id:123456}";
//Setup API key
string apiKey = "{APIKey}";
//Configure URI
WebRequest request = WebRequest.Create("HTTPS://secure.fusebill.com/v1/BulkApi/Process");
//Add Content type
request.ContentType = "application/json";
//Add Api key authorization
request.Headers.Add(HttpRequestHeader.Authorization, "Basic " + apiKey);
//Set request method
request.Method = "POST";
//Add the json data to request
using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
  streamWriter.Write(jsonData);
  streamWriter.Flush();
  streamWriter.Close();
}
//Perform the request
var httpResponse = (HttpWebResponse)request.GetResponse();
//Record the response from our request
var result = "";
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
  result = streamReader.ReadToEnd();
}

#Import library JSON
import json
#Import library Requests
import requests
#Pass in a dictionary to the Headers parameter
headers = {'Authorization' : 'Basic {APIKey}', 'Content-Type' : 'application/json'}
#Pass in a dictionary to the Payload parameter
payload = {'id':123456}
#Pass in your URI, Payload and Headers
r = requests.post('https://secure.fusebill.com/v1/BulkApi/Process', data=json.dumps(payload), headers=headers)
print(r.content)

{
    "id": 373321
}