python - asn1 parsed text to json

With text given in this link, need to extract data as follows

1. Each record starts with YYYY Mmm dd hh:mm:ss.ms, for example 2019 Aug 31 09:17:36.550
2. Each record has a header starting from line #1 above and ending with a blank line
3. The record data is contained in lines below Interpreted PDU:
4. The records of interest are the ones with record header first line having 0xB821 NR5G RRC OTA Packet -- RRC_RECONFIG

Is it possible to extract selected record headers and text below #3 above as an array of nested json in the format as below - snipped for brevity, really need to have the entire text data as JSON.

data = [{"time": "2019 Aug 31  09:17:36.550", "PDU Number": "RRC_RECONFIG Message", "Physical Cell ID": 0, "rrc-TransactionIdentifier": 1, "criticalExtensions rrcReconfiguration": {"secondaryCellGroup": {"cellGroupId": 1, "rlc-BearerToAddModList": [{"logicalChannelIdentity": 1, "servedRadioBearer drb-Identity": 2, "rlc-Config am": {"ul-AM-RLC": {"sn-FieldLength": "size18", "t-PollRetransmit": "ms40", "pollPDU": "p32", "pollByte": "kB25", "maxRetxThreshold": "t32"}, "dl-AM-RLC": {"sn-FieldLength": "size18", "t-Reassembly": "ms40", "t-StatusProhibit": "ms20"}}}]}}  }, next records data here]

Note that the input text is parsed output of ASN1 data specifications in 3GPP 38.331 section 6.3.2. I'm not sure normal python text parsing is the right way to handle this or should one use something like asn1tools library ? If so an example usage on this data would be helpful.

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