curl --request POST \
  --url https://www.firmium.de/api/v1/companies/{company_uuid}/tags/ \
  --header 'Content-Type: application/json' \
  --cookie sessionid= \
  --data '
{
  "company": 123,
  "tag_id": 123
}
'

{
  "id": 123,
  "company": 123,
  "company_name": "<string>",
  "tag": "<string>",
  "created_at": "2023-11-07T05:31:56Z"
}