This article will help you see exactly what data is being sent to Billy Grace in a few easy steps (this tutorial uses a Chrome browser):
Open the website on which you know the Billy Grace pixel is installed
Open the developer console in your browser
In developer console, click on the "network" tab. In the filter type "billy". If you refresh the page, you should see several items under name. These are the hits that are being sent to Billy Grace.
If you click on an event and then on "Payload", you will be able to see exactly what is being sent to Billy Grace. Part of this is also the "ed" field, this is the event data you are sending to Billy Grace.
If you keep the developer console and browse the website, you should see more come in overtime (these are all the events being sent to Billy Grace). You can use this to see exactly what events - with what data - are being sent to Billy Grace and debug any issues you have with custom events.
For example, you could now do a test purchase (or trigger any other conversion) to see if the purchase (conversion) event is firing. In the Payload you can also see which information is send to Billy Grace. In the ed field, you can see the transaction id or value.
For e-commerce: when testing Purchase events, make sure to do a test purchase for every available payment option, to make sure your events are firing correctly.
Happy debugging!