curl --request POST \
  --url https://api.contazen.ro/v1/invoice-series \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "FACT",
  "document_type": "fiscal",
  "description": "<string>",
  "start_number": 1,
  "is_primary": false
}
'

{
  "success": true,
  "data": {
    "id": "<string>",
    "object": "invoice_series",
    "name": "<string>",
    "document_type": "fiscal",
    "description": "<string>",
    "start_number": 123,
    "next_number": 123,
    "format": "FACT-{year}-{number}",
    "is_primary": true,
    "is_used": true,
    "year": 123,
    "created_at": 123
  },
  "meta": {
    "version": "v1",
    "request_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "response_time": "23.45ms"
  }
}