How to enable Availability Zone Rebalancing with JSON?

[ikegentz]

I have a variety of ECS services that I manage with JSON templates. CI runs these and updates my services using aws ecs update-service --cli-input-json ...

I would like to enable Availability Zone Rebalancing. I see availabilityZoneRebalancing as an option in --generate-cli-skeleton for aws ecs create-service, but no such option for aws ecs update-service, despite aws-ecs update-service supporting --availability-zone-rebalancing as a flag.

Is there a way to manage this setting via JSON for an existing ECS service?