Creating Sourcetype form event data not data

[robertlynch2020]

Hi

I am sending open telemetry Log data to Splunk.

I am sending 3 different types of logs to one index and to one source type (For the moment)

Is it possible to receive this data into Splunk and then create 3 different types of Sourcetypes, based on the event data, not the data?

 splunk_hec/logs: # pushed to splunk
    token: "ac3fa6bf-f9df-4757-a5e5-9ee7bf23160d"
    endpoint: "https://dell425srv:9088/services/collector"
    source: "mx"
    sourcetype: "otel"
    index: "murex_logs"
    tls:
      insecure_skip_verify: true

In the below image we can see the event data is called log.type.

There can be three of them. I need to make 3 source types from these 3.

Normally I would use a transform, but I think I can only use that on the data, not the event data?

Any help would be great 

Thanks in advance

Robbie