docs: def post(self, request, *args, **kwargs):
          """ Post a service request (requires authentication) """
          service_code = request.data['service_code']
  
          if service_code not in SERVICES.keys():
              return Response({ 'detail': _('Service not found') }, status=404)
  
          serializers = {
              'node': NodeRequestSerializer,
              'vote': VoteRequestSerializer,
              'comment': CommentRequestSerializer,
              'rate': RatingRequestSerializer,
          }
  
          # init right serializer
          kwargs['service_code'] = service_code
          kwargs['serializer'] = serializers[service_code]
  
          user=self.get_custom_data()
          request.UPDATED = request.data.copy()
          request.UPDATED['user'] = user['user']
          if service_code == 'node':
              for checkPOSTdata in ('layer','name','lat','long'):
                  # Check if mandatory parameters key exists
                  if checkPOSTdata not in request.data.keys():
                      return Response({ 'detail': _('Mandatory parameter not found') }, status=400)
                  else:
                      # Check if mandatory parameters values have been inserted
                      if not request.data[checkPOSTdata] :
                          return Response({ 'detail': _('Mandatory parameter not found') }, status=400)
              # Get layer id
              layer = Layer.objects.get(slug=request.UPDATED['layer'])
              request.UPDATED['layer'] = layer.id
  
              # Transform coords in wkt geometry
              lat = float(request.UPDATED['lat'])
              long = float(request.UPDATED['long'])
              point = Point((long, lat))
              request.UPDATED['geometry'] = point.wkt
              request.UPDATED['slug'] = slugify(request.UPDATED['name'])
  
          return self.create(request, *args, **kwargs)