register('myjson', my_dumps, my_loads, content_type='application/x-myjson',
    content_encoding='utf-8')
CELERY_ACCEPT_CONTENT = ['myjson']
CELERY_TASK_SERIALIZER = 'myjson'
CELERY_RESULT_SERIALIZER = 'myjson'
Celery: is there a way to write custom JSON Encoder/Decoder?