Find one nested key by name
Input
{"json":{"user":{"id":7,"profile":{"email":"a@example.com"}}},"query":"email"} Output
{
"query": "email",
"matchCount": 1,
"matches": [
{
"path": "$.user.profile.email",
"value": "a@example.com"
}
]
} Useful when you know the field name but not where it appears in the structure.