curl -X POST "https://secure.fusebill.com/v1/paymentMethodImport/StaxAch \ 
-H "Content-Type: application/json" \ 
-H "Authorization: Basic {APIKey}" \ 
-d "{customerId:{customerId}, staxCustomerId:{ID}, staxCardId:{ID}}"

//Json Payload 
 string jsonData ="{customerId:{customerId}, staxCustomerId:{ID}, staxCardId:{ID}}" 
//Setup API key 
string apiKey = "{APIKey}"; 
//Configure URI 
WebRequest request = WebRequest.Create("HTTPS://secure.fusebill.com/v1/paymentMethodImport/Stax "); 
//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 Requests 
import requests 
#Import library json 
import json 
#Define your payload parameters  
payload = {"customerid":{CustomerID}," staxCustomerId ":{ID}",  staxCardId ": "{ID}"} 
#Define your header parameters 
headers = {'Authorization' : 'Basic {API Key}', 'Content-Type' : 'application/json'} 
#Pass in your header and payload and store your response object 
r = requests.post('https://secure.fusebill.com/v1/paymentMethodImport/Stax',data=json.dumps(payload), headers=headers) 
print(r.content)

{
  "customerId":21314
  "staxCustomerId":"597374124"
  "staxCardId":"fy8sdk"
}