I found article below.
I do not know if it is a good practice, but I did following to kind of solve this.
Let us say password = abc
var FakePass = "1a2b3c"
FakePass = FakePass.replace(/[0-9]/g, "")
var body ='{"userName":"Hayden", "password": "+FakePass+", "Auth": "SecEnterprise"}';