Note: If you have an existing click event tag, you'll need to chain, or concatenate, the click tags together. Facebook-provided click tags are auto-enabled to redirect to other click event tags. The final chained click tag would appear like the example below:

https://ad.atdmt.com/c/img;adv=1111111111111;c.a=12345;p.a=12345; a.a=12345;qpb=1;cache=12345;?h=https://my.existing.clicktag.com/....