https://connector.greywolf.com/p21cloud/ws.aspx?APIKey=APIKEYHERE&result=json&v=1&api=SalesCustomerInsertUpdate&company_id=&customer_id=&customer_name=&mail_address1=&mail_address2=&mail_city=&mail_state=&zipcd=&central_phone_number=&central_fax_number=&last_maintained_by=&terms=&customer_type_cd=&po_no_required=&currency_id=&invoice_batch_uid=&statement_batch_uid=&salesrep_id=&taxable_flag=&email_address=&allow_line_item_freight_flag=&delete_flag=&source_price_cd=&default_branch=