var
    stringToJsObject=JSON.parse("{\"jsonObject\":{\"id\":\"2489651045\",\"type\":\"CreateEvent\",\"actor\":{\"id\":665991,\"login\":\"petroav\",\"gravatar_id\":\"\",\"url\":\"https://api.github.com/users/petroav\",\"avatar_url\":\"https://avatars.githubusercontent.com/u/665991?\"}},\"jsonArray\":[{\"id\":\"2489651051\",\"type\":\"PushEvent\",\"actor\":{\"id\":3854017,\"login\":\"rspt\",\"gravatar_id\":\"\",\"url\":\"https://api.github.com/users/rspt\",\"avatar_url\":\"https://avatars.githubusercontent.com/u/3854017?\"}}]}");
    console.log(stringToJsObject.jsonObject.type);
    console.log(stringToJsObject.jsonArray[0].actor.avatar_url);