Run Options in Marathon JSON

I was reading through the Wildfly Docker image documentation, and searched on google for more info on running the admin console through port 9990 on localhost.
That’s all well and good, pretty straight forward stuff.
Then I tried to mimmick this in Marathon and got hung up on specifying options for the Docker run command. Specifically, Marathon automatically executes the run command with (supposed?) optional parameter entry to use with run.

Was wondering if anybody had tried this approach, running Wildfly Docker image on Marathon and what your take is on implementing run options such as -p, etc.
I appreciate it.