Jump to song in playlist

[FrankBJensen]

Hi there.

I am immigrating from the first API to new REST api. Got most things up running. I would like to start playback from a specific song in a playlist, and when this song ends, continue shuffling in the playlist. This seems to be broken in the new API.

I found this, and that is exactly what I want to do
https://community.spotify.com/t5/Spotify-for-Developers/API-is-there-a-way-to-start-playing-a-playlist-from-a-specific/m-p/4976711

But if I apply both a playlist and a track uri in the ResumePlayback, it states, that I can supply only one or the other.
bool playing = play = spotify.Player.ResumePlayback(new PlayerResumePlaybackRequest() { DeviceId = dID, ContextUri = param1, Uris = param2 }).Result;

Is this a bug? Or is there another way to do this?
Thank you :)

[FrankBJensen]

I just found the offset parameter....... So this is probably the answer.

For anyone using time on this:
bool playing = spotify.Player.ResumePlayback(new PlayerResumePlaybackRequest() { DeviceId = dID, ContextUri = param1, OffsetParam = new PlayerResumePlaybackRequest.Offset { Uri = param2 } }).Result;