def format_v3_score_response(response):
    """
    {
        "<context_name>": {
            "scores": {
                "<rev_id>": {
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    },
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    }
                },
                "<rev_id>": {
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    },
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    }
                }
            },
            "models": {
                "<model_name>": <model_info>,
                "<model_name>": <model_info>
            }
        }
    }
    """
    context_doc = defaultdict(lambda: defaultdict(dict))
    if len(response.scores) > 0 or len(response.errors) > 0:
        for rev_id, rev_scores in response.scores.items():
            for model_name, score in rev_scores.items():
                context_doc['scores'][rev_id][model_name] = \
                    {'score': score}

        for rev_id, rev_errors in response.errors.items():
            for model_name, error in rev_errors.items():
                context_doc['scores'][rev_id][model_name] = \
                    util.format_error(error)

        for rev_id, rev_features in response.features.items():
            for model_name, features in rev_features.items():
                context_doc['scores'][rev_id][model_name]['features'] = \
                    features

    if len(response.model_info) > 0:
        context_doc['models'] = {
            model_name: info_doc
            for model_name, info_doc in response.model_info.items()}

    return util.jsonify({response.context.name: context_doc})
{
        "<context_name>": {
            "scores": {
                "<rev_id>": {
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    },
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    }
                },
                "<rev_id>": {
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    },
                    "<model_name>": {
                        "score": <score>,
                        "features": <features>
                    }
                }
            },
            "models": {
                "<model_name>": <model_info>,
                "<model_name>": <model_info>
            }
        }
    }