how to using rest api to create a ltm policy with asm policy?

Hi guys, I'm using rest api to create a ltm policy with asm policy, but it got a excetion. TMOS Version: 11.6.1

 

{u'errorStack': [], u'message': u'one or more configuration identifiers must be provided', u'code': 400}

 

here is my code:

 

!/usr/bin/env python
 -*- coding=utf-8 -*-
import requests, json

requests.packages.urllib3.disable_warnings()
bigip = requests.session()
bigip.auth = ('admin', 'admin')
bigip.verify = False
bigip.headers.update({'Content-Type': 'application/json'})
 创建LTM Policy
ltm_payload = {}
ltm_payload['name'] = 'demo-asm3'
ltm_payload['strategy'] = 'first-match'
ltm_payload['controls'] = ['asm']
ltm_payload['rules'] = [{'name': 'demo-asm3',
                         'ordinal': 1,
                         'actions': [{'name': 0,
                                      'enable': True,
                                      'asm': True,
                                      'request': True,
                                      'policy': 'asm-test'}
                                     ]}
                        ]
aaa = bigip.post('https://10.10.0.21/mgmt/tm/ltm/policy', data=json.dumps(ltm_payload))
print aaa.json()