curl --request POST \
  --url https://app.azalt.co/api/v1/activities/remove-by-filter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "formId": "<string>",
  "key": "<string>",
  "siteIds": [
    "<string>"
  ],
  "years": [
    123
  ],
  "periodUnits": [
    123
  ]
}
'

{
  "success": true,
  "count": 123
}