特约商户进件 提示参数“主体类型”是必填项？

为什么我按照文档 https://pay.weixin.qq.com/wiki/doc/apiv3/wxpay/tool/applyment4sub/chapter3_1.shtml 案例里面的请求案例，传了

"subject_info": {
		"subject_type": "SUBJECT_TYPE_INDIVIDUAL",
		"business_license_info": {
			"license_copy": "3IR2SgQ3ziYJDko-D8TyseVTlOb5PwwNqhFuLecd7TM_ocGEoa6ppOI46K_Mwqqh95WP4n6QATFd_4jaAfDFtCiWXXySKJoxIM",
			"license_number": "92356RTF9R",
			"merchant_name": "xxx吃店",
			"legal_person": "xxx"
		},
		"identity_info": {
			"id_doc_type": "IDENTIFICATION_TYPE_IDCARD",
			"id_card_info": {
				"id_card_copy": "xxxxM",
				"id_card_national": "aaaaa",
				"id_card_name": "xxxxx",
				"id_card_number": "xxxxx",
				"card_period_begin": "2016-04-25",
				"card_period_end": "2036-04-25"
			},
			"owner": "true"
		}
	}
主体都填了，怎么还提示我说没有填，我直接用demo里面的案例提交还是同样的问题： {"code":"PARAM_ERROR","detail":{"field":"/submitReq/organization_type","location":"body","value":""},"message":"参数“主体类型”是必填项"}

那organization_type这个什么字段信息