How to filter a hierarchy-node by Web-API-Command?

Hi,

I have built a prototype with Start-Point, Data Provider (BW-Query with hierarchy) and Table view with Toolbar-Button. Now I would like to select a row (hierarchy-node), klick the Toolbar-Button and send a Web-API Filter-command to the Data Provider, so that I just see the selected row (hierarchy-node) in the Table view.

I tried this Web-API-command but it doesn´t work:

'FILTER_NODE_IOBJNM=0CUST_SALES;FILTER_VALUE='&@Hierarchy_key&';FILTER_COLLAPSE= ;FILTER_IOBJNM=0CUST_SALES;'

Is it possible to set a filter to a hierarchy-node by Web-API-command and how does this work?

Best Regards,

Daniel