modify payload properties

Hi,

I am trying to deploy EC2 instances to multiple availability zones using vRA.

As part of the deployment I want to deploy EC2 instances in round robin to multiple availability zone.

example

instance1 goes  to availability zone 1

instance2 goes to availability zone 2

is there any way to achieve this using vRA or by updating property  /machine/properties/__amazon.subnetId : using vRO?

Thanks

Arun