def is_valid_manifest(manifest_json, required_keys):
    """
    Returns True if the manifest.json is a list of the form [{'k' : v}, ...],
    where each member dictionary contains an object_id key.
    Otherwise, returns False
    """
    for record in manifest_json:
        record_keys = record.keys()
        if not set(required_keys).issubset(record_keys):
            return False

    return True