You’ll need to post the full JSON response you’re getting from the API as text and use the </> button in the toolbar to format it (which removes smart quotes). It’s easiest to set a text input’s text to the green Response block so that you can select the text and copy it.
Without seeing the JSON, it’s almost impossible to answer your question about how to parse it.
I do have a tutorial that may be of help: API JSON Tutorial (Video)