How to access WebI report chart data in CSV through Restful web service call?

Hi,

I am trying to access WebI report chart data in CSV through Restful web service call but i am get only the following message in SOAP UI project

E.g:- In SOAP UI

request url : http://BI_HOST:6405/biprws/raylight/v1/documents/5193/reports/2

Header                              value

accept                               test/csv

X-SAP-LogonToken            logon token value.

O/P:-

<data contentType="text/csv" contentLength="4"><![CDATA[

]]></data>

can anyone help how to get webi report chart data through the restful webservice call.