Change value for Dynamic attribute in Rest adaptor

Hello Gurus,

I have a requirement where I have to store the URL in a attribute and then modfiy the suffix part of it.

I am able to store the value of the url using element "targetURL" in custom attribute "attr_targetURL", but now I am struggling to modify the value of "attr_targetURL".

Example: if the values of attr_targetURL is hhtps://xxxxxx.com/service then it should be replace to hhtps://abcde.com/service.

Can you please suggest how this can be achieved