{
  "event": "updateLink",
  "payload": {
    "id": "of:000000000000000b/2-of:000000000000000a/1",
    "type": "direct",
    "online": true,
    "linkWidth": 1.2,
    "src": "of:000000000000000b",
    "srcPort": "2",
    "dst": "of:000000000000000a",
    "dstPort": "1"
  }
}