A) Replace ARTIST-ID with the numeric value for the artist
B) The CAMPAIGN-ID is the Campaign ID for the Email for Media widget in Topspin.
To create an Email for Media (E4M) widget, go to: http://app.topspin.net/spin and select Email for Media is the blue drop down New Offer. Once you set up and save the E4M widget, click the link: Edit this Offer. This wil take you to the edit page for the saved widget. In the top left you will see the ID for the E4M widget, it looks similar to: Campaign ID: XXXXXXXX. This is the ID for CAMPAIGN-ID in the Campaign URL above.