Automatic Index Creation

Elastic Stack Elasticsearch
5

@Christian_Dahlqvist and @carly.richmond.
Below is one record which we received in csv file. The sixth field is the timestamp "1689182220000" (epoch format) on which basis Index should created automatic.

1711807094739562106740,31,INDAT,33,11711807094739562106740,1689182220000,V2,542,7,,59,7208,2,,,44,1,919968881699,8,IND19,1,919103699945,8,INDAT,404971040417284,,,Omgg so late baby😭😭,30458,1,CFA-9423,919968881699,1,1,,MSISDN,P2P,,,IND19,919968881699,0,0,MT

Could you please help me how we can process this timestamp field.

Thanks,
Debasis