JSON - String Problem

Hello, I am using Moodle Webservices.
I have a problem with the JSON-String:
If I have a quotation in my tag(name), then I got an JSON-Exception.

"modules":[
             {
                "id":"1234",
                "name":"  Hello to all my name is
"Mister Moodle" from USA"
             }

Is this a bug? Or how can I solve this problem?

Can anybody help me, please?