curl --request POST \
  --url https://api.siftstack.com/api/v1/export \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "outputFormat": "EXPORT_OUTPUT_FORMAT_UNSPECIFIED",
  "exportOptions": {
    "useLegacyFormat": true,
    "simplifyChannelNames": true,
    "combineRuns": true,
    "splitExportByAsset": true,
    "splitExportByRun": true
  },
  "channelIds": [
    "<string>"
  ],
  "calculatedChannelConfigs": [
    {
      "name": "<string>",
      "expression": "<string>",
      "channelReferences": [
        {
          "channelReference": "<string>",
          "channelIdentifier": "<string>"
        }
      ],
      "units": "<string>"
    }
  ]
}
'

{
  "presignedUrl": "<string>",
  "jobId": "<string>"
}