Hi I need to search a JSON response for all values of the key "columnName" that begin (only begin) with a specific string pattern of...

```
"IDM_"

```

For all matches I want to include a key/value "IDM":true and for any unmatched items "IDM":false on each object.

Thanks in advance.

```
{
"columnPermissions": [{
    "$id": "1474",
    "columnName": "IDM_ID"
}, {
    "$id": "1475",
    "columnName": "IDM_CreateDate"
}, {
    "$id": "1476",
    "columnName": "IDM_CreatedBy"
}, {
    "$id": "1480",
    "columnName": "First_Name"
}, {
    "$id": "1481",
    "columnName": "Last_Name"
}]

}

```