class MikroTikService:
    # ... existing methods ...

    def set_subscriber_ip_binding(self, mac_address: str, ip_address: str, comment: str):
        """
        Creates an IP binding in /ip/hotspot/ip-binding or /ip/arp.
        """
        client = self._get_client()
        payload = {
            'mac-address': mac_address,
            'address': ip_address,
            'comment': comment,
            'type': 'bypassed'
        }
        return client.execute_rest_command('PUT', '/ip/hotspot/ip-binding', payload)

@action(detail=True, methods=['post'], url_path='ip-binding')
def add_ip_binding(self, request, pk=None):
    router = self.get_object()
    service = MikroTikService(router)
    mac = request.data.get('mac_address')
    ip = request.data.get('ip_address')
    
    result = service.set_subscriber_ip_binding(mac, ip, f"Tenant: {request.tenant.name}")
    return Response(result)