Widevine DRM implementation

Hi,
I am trying to implement Widevine DRM on roku. I am following tutorial https://sdkdocs.roku.com/display/sdkdoc/Content+Protection#ContentProtection-Widevine-BETA

My license server expects request payload (POST method). As I can see I can attach query string to license server url, how can I set payload? Thanks

Please help regrading Widevine DRM implementation, if you have resolved out issue

Hi @bird3214 @haridhanani , let us know if you resolved this implementation