Findstr command

[user171078]

hello
i need to write batch file to write all lines contain line actor_id to result text file i know command findstr i have text file :example .txt
"name": "Accounts",
"type": "public_supergroup",
"id": 1192035345,
"messages": [
{
"id": 1,
"type": "service",
"date": "2020-04-24T03:55:07",
"date_unixtime": "1587725707",
"actor": "Accounts & Social Media Market",
"actor_id": "channel1192035345",
"action": "migrate_from_group",
"title": "1",
"text": "",
"text_entities": []