curl --request GET \
  --url https://server.promptwatch.com/api/v1/share-of-voice/comparison \
  --header 'X-API-Key: <api-key>'

{
  "current": {
    "totalResponses": 123,
    "brandMentions": 123,
    "shareOfVoice": 123
  },
  "previous": {
    "totalResponses": 123,
    "brandMentions": 123,
    "shareOfVoice": 123
  },
  "change": 123,
  "changePercent": 123
}