Received an event that has a different character encoding from DLP software

{:text=>"\u0000\x FF\u0001\u0000\u0000$\u0000\r\u0000 \u0000\u001E\u0006\u0001\u0006\ u0002\u0006\u0003\u0005\u0001\u0005\u0002\u0005\u0003\u0004\u0001\u0 004\u0002\u0004\u0003\u0003\u0001\u0003\u0002\u0003\u0003\u0002\u000 1\u0002\u0002\u0002\u0003", :expected_charset=>"UTF-8"}

I tried changing the charset

input {
tcp {
port => 5153
id => "dlp-input"
codec => json {
charset => "ASCII-8BIT"
}