How to parse this json and fail test if error key exists?

Gatling (Open-Source)
1

I want parse this json:

{
“jobId”: “176b159e-cc0a-41c5-9681-a17507a18c41”,
“result”: “{“error”:“Some Error”}”
}

I’ve tried it like this:
.check(status.is(200), jsonPath("$.result.error").notExists)

but seems jsonPath can’t find anything in result key.
How to do what I want correctly?

Thanks in advance.

Sergey