##发送IM消息 ~~~[api] post:/api/im/sendMiddleMsg *long:orderId=100001#订单id *content=aaa#发送的内容 *appid=abcdefghijklmn#商户申请的appid *requestId=abcdefghijklmn#请求唯一ID *requestTime=abcdefghijklmn#请求时间 *sign=abcdefghijklmn#签名信息 <<< success { "code": "000", "message": "success", "data": [] } <<< error { "code": "200006", "message": "服务商信息有误，请重新登录或联系客服", "data": null } <<< error { "code": "002", "message": "参数为空或者不存在", "data": null }