Hello.
I know this is an old thread but the problem is exactly the same and I think it would help make the answer/solution more clear.
I am facing the same problem (Unterminated object at character 18).
I tried copy-pasting the quote from quote #3 above, with no success.
Marcorome, can you please let me know which keyboard combination on MAC creates the correct quote for MAC JSON file?
Also, should the quotes be different at the beginning and the end?
If it's possible, it might be easier if you could upload your JSON file.
Thanks.