web/gui/src/main/webapp/json/eventTest_21.json

{
  "event": "addLink",
  "payload": {
    "src": "of:0000ffffffff0001",
    "srcPort": "2",
    "dst": "of:0000ffffffffff01",
    "dstPort": "1",
    "type": "optical",
    "linkWidth": 2,
    "props" : {
      "BW": "70 G"
    }
  }
}