{
  "dial": {
    "action": "http://example.com",
    "callerId": "+1312888899",
    "target": [
      {
        "type": "sip",
        "number": "sip:1617333456@sip.trunk1.com",
        "auth": {
          "username": "foo",
          "password": "bar"
        }
      }
    ]
  }
}