Ec2 AutoScaling User Data not running

I'm trying to add user data to my auto scaling on AWS.

When I setup my launch configuration through the web console on AWS I entered the following user data:

#!/bin/bash
echo $RANDOM > /home/ubuntu/clusterID

I had to base64 encode it, I did that with base64encode.org. The result:

IyEvYmluL2Jhc2gNCmVjaG8gJFJBTkRPTSA+IC9ob21lL3VidW50dS9jbHVzdGVySUQ=

When the ec2 instance launches I see the following error:

2015-02-24 07:50:08,754 - init.py[WARNING]: Unhandled non-multipart userdata starting 'IyEvYmluL2Jhc2gNCmVjaG8g...'

Any ideas what I'm doing wrong?