Thx so much Hendrix for the prompt response!
so i think there is some progress but not there yet
so now i run this as you suggested
wget http://localhost:52199/MCWS/v1/Control/MCC\?Command\=10023&Parameter=5
now this seems for some reason to set the track rating to '0' (missing)
the output is here
zeltak@zlap:~/ZH_tmp/mctest|⇒ wget http://localhost:52199/MCWS/v1/Control/MCC\?Command\=10023&Parameter=5
[1] 1064
Redirecting output to ‘wget-log.2’.
[1] + 1064 done wget http://localhost:52199/MCWS/v1/Control/MCC\?Command\=10023
and the log file
--2018-09-24 11:30:11-- http://localhost:52199/MCWS/v1/Control/MCC?Command=10023
Resolving localhost (localhost)... ::1, 127.0.0.1
Connecting to localhost (localhost)|::1|:52199... failed: Connection refused.
Connecting to localhost (localhost)|127.0.0.1|:52199... connected.
HTTP request sent, awaiting response... 200 OK
Length: 83 [text/xml]
Saving to: ‘MCC?Command=10023.3’
MCC?Command=10023.3 0%[ ] 0 --.-KB/s
MCC?Command=10023.3 100%[===========================================================================>] 83 --.-KB/s in 0s
2018-09-24 11:30:11 (3.43 MB/s) - ‘MCC?Command=10023.3’ saved [83/83]