JSONDecodeError while running calling "download_dashboard_pdf.py" for exporting dashboard to pdf

Hi everyone, if anyone of you familiar with the looker API for noodlanding dashboard as pdf. I am facing some issue while passing filters in the code. Can you help me out.

I wants to add some filters on dashboard which are like below image.
 

0388081f-2d89-47b2-9872-afd4b2dfb98d.png

But while parsing those filter values as argument in the API giving error. Any one knows how to avoid/resolve this error. Or what is the correct format to pass the filter values.

I am parsing the argument as below which is mentioned in the github API doc. 

example :$ python download_dashboard_pdf.py "A Test Dashboard" '{"filter1": "value1, value2", "filter2": "value3"}'

actual code I am passing :  $ python download_dashboard_pdf.py "A Test Dashboard" ‘{“Account name “: “AFB”}’

a7de7729-73dc-4f94-8d5e-11f5b6e61dea.png
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