Tam,
You can use RegEx to edit the data before you index your file into Splunk. As data passes through our pipeline, we have the option to use RegEx to identify/classify the data as we write it into our Flat File Time-series Index. The answer to your question posted by sbbadri will work for you; you can these RegEx expressions that he listed to remove the double quotes " from your raw events. If you want to verify if an expression will return an expected string, use regex101.com.
"Props.conf" file can be found in the /Splunk/etc/system/default directory. It includes settings for the processing properties of your data e.g. line-breaking, character encoding, timestamp recognition, event segmentation, automated host, sourcetype matching overrides, search-time field extraction definitions. More information on props.conf stanzas: https://docs.splunk.com/Documentation/Splunk/6.6.2/Admin/Propsconf
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