Refactoring API controller with respond_with and responders gem

I was doing an API and started using render, in this way:

def create
  begin
    alert_for_filter = AlertForFilter.new
    alert_for_filter.user = current_user
    alert_for_filter.name = params[:alert_for_filter][:name]
    alert_for_filter.category = Categoria.find(params[:alert_for_filter][:category_id])
    alert_for_filter.filters = create_filters(params[:alert_for_filter][:filters])
    alert_for_filter.save!

    render json: alert_for_filter, only: alert_for_filter_permited_fields, status: 200
  rescue
    render json: "Errors", status: 400
  end
end

But now I want to refactor this using respond_with and responders gem.

I tried to remove the "begin-rescue", the save! and render. And added that:

respond_with(alert_for_filter)

How can I refactor this?