How to modify a security catalog(.cat) file?

I’m working on a driver for creative CA20K2 based audio cards for win10 1903+. The problem is, when I used Dsigntool to create a CAT file for digital signature, it always generates an error when there’s a .uda file in the list. Is there any workaround for this? For example, if there’s a tool to modify the existing cat file directly then everything should be much easier. thanks.