How to create and run Jasper Report with JSON data passed to it via REST?

Imports System.Net
 
Module ModuleMain
 
    Sub Main()
 
        ' WebClient Class Implementation '
        Dim wc As WebClient = New WebClient()
 
        ' Authorize the http request '
        Dim cc As CredentialCache = New CredentialCache()
        cc.Add(New Uri("http://<JasperServerHostname>:8080/"), "Basic", New NetworkCredential("admin", "admin"))
        wc.Credentials = cc
 
        ' Set the base address of the Reports service '
        wc.BaseAddress = "http://<JasperServerHostname>:8080/jasperserver/rest_v2/reports/"
 
        ' Create the inputControl parameter to send to JasperServer as a QueryString parameter '
        Dim data As Specialized.NameValueCollection = New Specialized.NameValueCollection()
        data.Add("jsonString", Uri.EscapeDataString("[{""CustNum"":""      2"",""CustSeq"":""0"",""Name"":""Coordinated Bicycles - North""}]"))
        wc.QueryString = data
 
        ' Setup the file to download the report to '
        Dim outputBasePath As String = "\\<ERPServerReportOutputDirectory>\"
        Dim fileName As String = "CustomerReport-" & DateTime.Now.ToString("yyyyMMdd_HHmmssff") & ".pdf"
 
        ' Submit the http request and get the output resource '
        wc.DownloadFile("Reports/CustomerReport.pdf", outputBasePath & fileName)
 
        ' Launch the PDF file using the default PDF viewer application '
        System.Diagnostics.Process.Start(outputBasePath & fileName)
 
    End Sub
 
End Module