import re
text = '{\\"event\\":{\\"header\\":{\\"transactions\\":{\\"localTransactions\\":{\\"id\\":\\"11111111-239e-4f86-9f5a-111111111111\\",\\"sourceApplication\\":{\\"name\\":\\"worker\\",\\"host\\":\\"worker-67bcdfc6bb\\"},\\"createdAt\\":\\"2021-04-08T14:05:03.571Z\\",\\"websocketId\\":\\"abc=\\"},\\"localTransaction\\":[]},\\"user\\":null,\\"interceptorId\\":null},\\"payload\\":{\\"operation\\":{\\"operationCode\\":\\"500\\",\\"applicationErrorCode\\":\\"202\\",\\"operationMessage\\":\\"Exception\\",\\"status\\":\\"failure\\",\\"reason\\":\\"Failure - Failed to ggg.\\"},\\"response\\":{\\"operation\\":{\\"operationCode\\":\\"500\\",\\"applicationErrorCode\\":\\"CP0202\\",\\"operationMessage\\":\\"Exceptio. We are working on it and will in [TRUNCATED]'
regex_pattern = r'localTransactions\\":{\\"id\\":\\"(.*?)\\",\\"sourceApplication'
regex_result = re.search(regex_pattern, text)    
if regex_result:
  print("We have a match!", regex_result.group(1), sep="\n")
else:
  print("No match")