{
  "name": "my-instance",
  "machineType": "zones/us-central1-c/machineTypes/n1-standard-1",

  "disks": [
      {
          "boot": "True",
          "autoDelete": "True",
          "initializeParams": {
              "sourceImage": "https://www.googleapis.com/compute/v1/projects/gce-uefi-images/global/images/ubuntu-1804-bionic-v20181203a"
          }
      }
  ],

  "networkInterfaces": [{
      "network": "global/networks/default",
      "accessConfigs": [
          {"type": "ONE_TO_ONE_NAT", "name": "External NAT"}
      ]
  }],

  "serviceAccounts": [{
      "email": "default",
      "scopes": [
            "https://www.googleapis.com/auth/devstorage.read_only",
            "https://www.googleapis.com/auth/logging.write",
            "https://www.googleapis.com/auth/monitoring.write",
            "https://www.googleapis.com/auth/servicecontrol",
            "https://www.googleapis.com/auth/service.management.readonly",
            "https://www.googleapis.com/auth/trace.append"
      ]]
  }],

  "metadata": {
      "items": [{
          "key": "startup-script-uri",
          "value": "gs://my-bucket/my-startup.sh"
      }]
  }
}