* It returns 0 on success or a negative value on error answer.
* The object pointed by 'result' is filled and must be released by the caller
* after its use by calling 'json_object_put'.
* It returns 0 on success or a negative value on error answer.
* The object pointed by 'result' is filled and must be released by the caller
* after its use by calling 'json_object_put'.