Are you submitting IMM 5669 online or part of your initial spousal PR application? If it's the latter, you'll need to print out the form and sign using pen, otherwise your entire application will get returned:
"For this form to be accepted as part of a paper application, each person required to complete it must a) type their name in the signature box and the bottom, b) validate the form, c) print out the validated form, and d) sign in writing (i.e provide a handwritten signature) next to the typewritten name in the signature box."
If you're submitting this form online, then you should be fine just typing your name
