Genesys Data Action: JSON parse error on Cognigy profile token response

Trying to fetch a Cognigy profile token via a Genesys Data Action. The HTTP call succeeds with a 200, but the mapping step fails with a JSON parsing error. The payload comes back wrapped in a data object, not as a flat JSON blob. Here is the response structure I’m getting:

{
 "data": {
 "token": "abc123"
 }
}

I can’t seem to drill down to data.token in the mapping expression. Any ideas?