POST /

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

Action=CreateTransitGateway&Description=__Description__&DryRun=true&Options.AmazonSideAsn=1&Options.AutoAcceptSharedAttachments=enable&Options.DefaultRouteTableAssociation=enable&Options.DefaultRouteTablePropagation=enable&Options.DnsSupport=enable&Options.MulticastSupport=enable&Options.SecurityGroupReferencingSupport=enable&Options.TransitGatewayCidrBlocks.1=__Member__&Options.TransitGatewayCidrBlocks.2=__Member__&Options.VpnEcmpSupport=enable&TagSpecification.1.ResourceType=capacity-reservation&TagSpecification.1.Tag.1.Key=__Key__&TagSpecification.1.Tag.1.Value=__Value__&TagSpecification.1.Tag.2.Key=__Key__&TagSpecification.1.Tag.2.Value=__Value__&TagSpecification.2.ResourceType=capacity-reservation&TagSpecification.2.Tag.1.Key=__Key__&TagSpecification.2.Tag.1.Value=__Value__&TagSpecification.2.Tag.2.Key=__Key__&TagSpecification.2.Tag.2.Value=__Value__&Version=2016-11-15