Get data from json format!!!

[phongvucba]

Hello ! It's been a while since I texted you. I can only try it now. It outputs the LOG section like this:
---------------------------------
* string: [
{
"EventDateTimeUTC": "2023-02-07T03:33:58Z",
"OperationID": 17,
"OperationDescription": "Door opened (key)",
"UserName": "MASTER",
"DoorName": "201"
}
]
------------------------------
Can you help me? For example, now I want to get the values of the fields in "String" , for example "MASTER" or "OperationID" to assign to an address 1/1/0 ?
Thank you very much !