How to use HttpRequest as array of "[key] = [value]"

I'm looking for solution to my problem:

I'm got rest request in TestCase, and i need to get this request in script as Array['name' = 'value']

How can i do this using SoapUI\NG ? I tried something like:

def request = context.expand( '${selectMemberId#Request}')

but its seems like string, or something. After trying execute this im getting empty string, but i have atleast 2 custom properies filled

Can anybody help me?