Hi,

I am following your API documentation to record a payment against an invoice and mark invoice as paid but the API is not working.

I have the below json parameter 

{"JSONString":{"customer_id":"2058964000000074031","payment_mode":"cash","amount":105,"account_id":"450000000000353","date":"2019-10-31","invoices":[{"invoice_id":"2058964000000093105","amount_applied":105}]}}

code:

    parameters = Map();
    invoicedetails = Map();
    invoicedetails.put("invoice_id","2058964000000093105");
    invoicedetails.put("amount_applied",105);
    inv = list();
    inv.add(invoicedetails);
    parameters.put("customer_id","2058964000000074031");
    parameters.put("payment_mode","cash");
    parameters.put("amount",105);
parameters.put("date","2019-10-31");

    parameters.put("invoices",inv);
    data = Map();
    data.put("JSONString",parameters);
    info data;
    resp = invokeurl
    [
        url :"https://inventory.zoho.com/api/v1/customerpayments?organization_id=" + organizationID
        type :POST
        parameters:data
        headers:header
    ];
    info resp;

//header info is using correct auth token and content type format so I did not provided here.

{"code":1000,"message":"Internal Error"}