import uuid
import time


def create_billing(_order_id):
    """
    Create a billing entity.

    :param _order_id: The order ID the billing belongs to.
    :return: A dict with the entity properties.
    """
    return {
        'entity_id': str(uuid.uuid4()),
        'order_id': _order_id,
        'done': time.time()
    }