how to read bluetooth UUID?

Hello ,
when I scan the bluetooth , I get this message:

 BluetoothDevice: {
    "id": "3c:bd:3e:2f:0f:18",
    "rssi": -90,
    "data": new Uint8Array([2, 1, 2, 17, 7, 252, 157, 208, 179, 203, 132, 224, 132, 6, 66, 243, 247, 225, 224, 191, 203]).buffer,
    "services": [
      "cbbfe0e1-f7f3-4206-84e0-84cbb3d09dfc"
     ]
   },
  BluetoothDevice: {
    "id": "c8:d0:83:e3:4b:1f public",
    "rssi": -83,
    "data": new Uint8Array([2, 1, 26, 2, 10, 12, 10, 255, 76, 0, 16, 5, 1, 16, 239, 212, 67]).buffer,
    "manufacturer": 76,
    "manufacturerData": new Uint8Array([16, 5, 1, 16, 239, 212, 67]).buffer
   },

for the first devive I see:
why there is no manufacturer number?
and how can I read the services ? what does it mean? can one expalin ?
also , what does "data" mean? how can I understadn what he sending?

for the second device:
is there a list of manufacturers? so number 76 is iphone (for example?)
also what does the manufacturerData mean? how can I understand it?

the reason I'm asking is - I have a blutooth device I want to write for him application , and I want to see how and I can read from it

Thanks ,