Play Spotify on a speaker from HTTP command

[lamaxinfo]

Hi, with my AudioCast speaker i have the possibilities to play a URI playlist with the following HTTP string:

http ://10.10.10.254/httpapi.asp?command=setPlayerCmd:play:uri
Play the URI

http ://10.10.10.254/httpapi.asp?command=setPlayerCmd:playlist:uri:<index>
Play the URI (URI is the m3u playlist, index is the start index)

http ://10.10.10.254/httpapi.asp?command=setPlayerCmd:hex_playlist:uri:<index>
Play the URI (URI is the m3u playlist, index is the start index), here, uri is hexed

I can use this string to start playing a playlist or a song directly from my domotic home system to my speaker?