BLE Gateway V4 MQTT and problems getting information msgpack.unpackb

I m using python like this :

import time
import paho.mqtt.client as mqtt
import msgpack

def on_subscribe(mosq, obj, mid, granted_qos):
    print("Subscribed: " + str(mid))

def on_message(mosq, obj, msg):
    print("=============================================")
    for d in msgpack.unpackb(msg.payload)[b'devices']:
      print(d)
def on_connect(mosq, obj,flags, rc):
    print("Connected with result code "+str(rc))
    mqttc.subscribe("lolo", 0)
    print("Connected")


mqttc = mqtt.Client()
mqttc.on_connect = on_connect
mqttc.on_subscribe = on_subscribe
mqttc.on_message = on_message
mqttc.connect("mqtt.bconimg.com", 1883, 60)
mqttc.loop_forever()

And this is the result :

=============================================
b'\x00DO\xf2\x1c\xac\xe6\xbb\x02\x01\x1a\n\xffL\x00\x10\x05\x03\x18\xf8D\x00'
b'\x00S\xb2\xd12\xa80\xa7\x02\x01\x1a\t\xff\xc4\x00\x133\x02\x13\x15\x80\x03\x03\xb9\xfe\x08\x1b\x00$\x98\x05N\x1c|'
b'\x00O\x08:\x1d\x0c\xad\xa6\x02\x01\x1a\x1a\xffL\x00\x0c\x0e\x00z0\x1d|\xceF\x985\x00\x12\xd0fM\x10\x05\x0b\x1c\xab\x1d\xef'
b'\x00hdK\x0c\xb4S\xa3\x02\x01\x1a\x0b\xffL\x00\t\x06\x03t\xc0\xa8\n\x05'
b'\x03k\xd5\x04\x13\xf8P\xa7\x1e\xff\x06\x00\x01\t \x02|\x02\xa0\xba\xf5^\xba\x11\x1e!\x9a \xb8\xe9\xa2\x12\x86w`\xd9\xcct\xf3'

How can I convert this data match this : https://wiki.aprbrother.com/en/User_Guide_For_AB_BLE_Gateway_V4.html

Without your help, I just can not use your product

Thanks in advance

Laurent