Integrating to splunk

Hi All, We are working on getting appian data to splunk. Appian has been configured to push the logs to splunk syslog endpoint. We have tried several things but the data received in splunk is still encrypted. 

https://docs.appian.com/suite/help/21.2/Log_Streaming_for_Appian_Cloud.html#prerequisite-checklist

Below is the config of splunk. Please help us if you have done this is past or have knowledge on how to fix this. 

etc\apps\search\local\inputs.conf

[tcp://514]
connection_host = ip
index = appian
sourcetype = syslog

[SSL]
requireClientCert = false
serverCert =  $SPLUNK_HOME\etc\auth\splunkweb\myDataCertificate.pem
sslVersions = tls1.2
cipherSuite = ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:DH-DSS-AES256-GCM-SHA384:DHE-DSS-AES256-GCM-SHA384:DH-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA256:DH-RSA-AES256-SHA256:DH-DSS-AES256-SHA256:ADH-AES256-GCM-SHA384:ADH-AES256-SHA256:ECDH-RSA-AES256-GCM-SHA384:ECDH-ECDSA-AES256-GCM-SHA384:ECDH-RSA-AES256-SHA384:ECDH-ECDSA-AES256-SHA384:AES256-GCM-SHA384:AES256-SHA256

Sample Encrypted Data

10/10/21 8:04:18.000 PM
\x00\x00\x00\x9E\x00\x9F\xC0|\xC0}\x003\x00g\x009\x00k\x00E\x00\xBE\x00\x88\x00\xC4\x00\x00\xA2\x00\xA3\xC0\x80\xC0\x81\x002\x00@\x008\x00j\x00D\x00\xBD\x00\x87\x00\xC3\x00\x00f\x00\x00D\x00\x00\x00\x00\x00\x00\xFF\x00\x00\x00#\x00\x00\x00

10/10/21 8:04:18.000 PM
\xC0r\xC0\xC0\xC0/\xC00\xC0\x8A\xC0\x8B\xC0\xC0'\xC0\xC0v\xC0\xC0\x00\x9C\x00\x9D\xC0z\xC0{\x00/\x00<\x005\x00=\x00A\x00\xBA\x00\x84\x00\xC0\x00