curl --request POST \
  --url https://app.azalt.co/api/v1/activities/import \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "formId": "<string>",
  "activities": [
    {
      "key": "<string>",
      "siteId": "<string>",
      "year": 123,
      "periodUnit": 123,
      "input": {},
      "activityId": "<string>"
    }
  ],
  "fileName": "<string>",
  "mediaId": "<string>"
}
'

{
  "activities": [
    {
      "activityId": "<string>",
      "input": {},
      "value": 123,
      "metadata": {},
      "key": "<string>",
      "siteId": "<string>",
      "year": 123,
      "periodUnit": 123
    }
  ],
  "deletedActivityIds": [
    "<string>"
  ]
}