How to set TIME_FORMAT and TIME_PREFIX in props.conf with Docker log driver?

Currently, we are using Splunk universal forwarder where following parameters are set in props.conf: props.conf [json] TIME_FORMAT = %Y-%m-%dT%H:%M:%S.%3NZ TIME_PREFIX = \"time\"\:\" INDEXED_EXTRACTIONS = JSON SHOULD_LINEMERGE = false I am working on using docker swarm as our infrastructure orchestration platform and started using docker splunk-log driver with it. I am not able to find proper log-options to be used with driver using which I can achieve similar effect as was achieved by using above props.conf file with Splunk universal forwarder. How can I set above props.conf options with docker log driver? Thanks, Navdeep