curl --request POST \
  --url https://platform.versori.com/api/v2/store/{store}/kv/count \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "selector": {
    "prefix": [
      "<string>"
    ]
  }
}
'

{
  "count": 123
}