POST /

Content-Type: application/x-www-form-urlencoded

Action=AssociateAddress&AllocationId=__AllocationId__&AllowReassociation=true&DryRun=true&InstanceId=__InstanceId__&NetworkInterfaceId=__NetworkInterfaceId__&PrivateIpAddress=__PrivateIpAddress__&PublicIp=__PublicIp__&Version=2016-11-15