This snippet of JSON-encoded data could be used with a VMware NSX RESTful API call to create a new logical switch.

new-lswitch-json

{
  "display_name": "test-lswitch", 
  "port_isolation_enabled": false, 
  "transport_zones": [
    {
      "zone_uuid": "dca3d854-b329-5458-b711-0df2d5762d7a", 
      "binding_config": {}, 
      "transport_type": "stt"
    }
  ], 
  "replication_mode": "source", 
  "type": "LogicalSwitchConfig"
}