Problems with capture response.

I'm having a problem while trying to integrate suno api into voiceflow. I get sucessefully API calls and even get a positive responte ( a music generated directed from the voiceflow) but, i'm tottally unable to get the "capture response" into my variable, i've tried everything that i knew it and even if everything with the api goes well the value on the variable that i put on the capture response is ALWAYS 0 - in this case, its fundamental that the person talking with the chat can have acess to the URL of the music gerated - the URL appears in the JSON body of the API call, and it's working well , but when it comes to apply that url to a variable, it's seem its just impossible, the value is alwyas 0.