payload.json

{
  "resource_spans": [{
    "resource": {
      "attributes": [{
        "key": "host.name",
        "value": { "stringValue": "example" }
      }]
    },
    "scope_spans": [{
      "spans": [
        {
          "trace_id": "5B8EFFF798038103D269B633813FC60C",
          "span_id": "EEE19B7EC3C1B174",
          "parent_span_id": "EEE19B7EC3C1B173",
          "name": "testSpan",
          "start_time_unix_nano": 1544712660300000000,
          "end_time_unix_nano": 1544712660600000000,
          "kind": "SPAN_KIND_CLIENT"
        }
      ]
    }]
  }]
}