回调的请求body, response_id请原样返回
{ "childId":"孩子ID", "userId":"家长Id", "schoolId":"学校id", "tag":"joinFamily", "response_id":"123aasdfAADDDCMKDJ" }
{ "childId":"孩子ID", "userId":"家长Id", "tag":"outFamily", "response_id":"123aasdfAADDDCMKDJ" }
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