def timestamp
      value = self['timestamp']
      if value.kind_of? Integer
        value = value / 1000 if value > 9999999999
        Time.at(value)
      else
        value
      end
    end
def timestamp
      value = self['timestamp']
      if value.kind_of? Integer
        value = value / 1000 if value > 9999999999
        Time.at(value)
      else
        value
      end
    end
Convert the 'timestamp' field from a string to a Time object

 @return [Time]