Custom Properties Feature is not supported for Server-Side API in Ruby SDK about facebook-ruby-business-sdk

[alanho]

custom properties is currently supported, you can put custom properties in the custom data

custom_data = FacebookAds::ServerSide::CustomData.new(currency: 'usd', custom_properties: {new_customer: 1})

event = FacebookAds::ServerSide::Event.new(
        event_name: 'Purchase',
        event_time: Time.now.to_i,
        user_data: user_data,
        custom_data: custom_data,
        event_source_url: 'http://jaspers-market.com/product/123',
        action_source: 'website'
    )