ActiveMQ: REST API and JMS Headers

Hello,

When putting messages to ActiveMQ via the RESTful API (see for example
http://activemq.apache.org/rest.html), how am I able to set the JMS Headers
such as Correlation Id, Priority, ReplyToQueue, Expiry, etc? Can someone
please let me know or point me to the appropriate resource?

Note that the sender is not a Java application.

Thanks.