Discover Interfaces on a Node using the REST API

Hello,

Can somebody guide me on how to do this? I know we have to use the Invoke verb and Orion.NPM.Interfaces/DiscoverInterfacesOnNode as the SDK document states. Should I pass the DiscoverInterfacesOnNode in the URI like

https://xx.yy.zz.aa:17778/SolarWinds/InformationService/v3/Json/Invoke/Orion.NPM.Interfaces/DiscoverInterfacesOnNode

or do I need to pass them as JSON? and how do I pass the node that I want to discover interfaces on?

Thank you,

Nuruddin