I have a Java log file with entries starting with a timestamp like this:

2024-07-31 12:50:34,066 ERROR Sample error message here

In Ops Agent config.yaml, I tried to follow the instructions here:
https://cloud.google.com/stackdriver/docs/solutions/agents/ops-agent/configuration

Given the format of the timestamp above, I have the processors like this:

  processors:
    parse_java_multiline:
      type: parse_multiline
      match_any:
      - type: language_exceptions
        language: java
    extract_structure:
      type: parse_regex
      field: message
      regex: "^(?<time>d{4}-d{2}-d{2} d{2}:d{2}:d{2},d{3}) (?<severity>S+) (?<message>(.|\n)*)$"
      time_key: time
      time_format: "%Y-%m-%d %H:%M:%S,%f"
    move_severity:
      type: modify_fields
      fields:
        severity:
          move_from: jsonPayload.severity

In Log Explorer, the log entry’s jsonPayload will only contain the message, no timestamp.
The receiveTimestamp and timestamp both show the time when log was ingested and in this format:

"2024-08-01T03:57:33.369350969Z"

Question: How to display the timestamp in the log, and in the same format as the log entry?