client.rb

    57: def create_event(url, event_name, attributes = {})
 => 58:   binding.pry
    59:   body = { :name => event_name, :data => attributes }
    60:   body[:timestamp] = attributes[:timestamp] if valid_timestamp?(attributes[:timestamp])
    61:   verify_response(self.class.post(url, options.merge(:body => body)))
    62: end

[1] pry(#<Customerio::Client>)> attributes
=> {:alphabet=>["a", "b", "c"]}