curl --request PUT \
  --url https://prod-api.raisedonors.com/api/Segment/{id} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "campaignId": 123,
  "name": "<string>",
  "code": "<string>",
  "description": "<string>",
  "externalIdentifier": "<string>"
}
'

{
  "id": 123,
  "campaignId": 123,
  "campaignName": "<string>",
  "name": "<string>",
  "description": "<string>",
  "code": "<string>",
  "externalIdentifier": "<string>",
  "totalDonors": 123,
  "totalGifts": 123,
  "totalGiftAmount": "<string>",
  "averageGiftAmount": "<string>",
  "medianGiftAmount": "<string>",
  "highestGiftAmount": "<string>",
  "totalVisitors": 123,
  "conversionRate": "<string>",
  "createdDateTime": "<string>",
  "modifiedDateTime": "<string>"
}