Log Api Gateway request/response body/headers to ElasticSearch - aws-lambda

Question

It's easy to setup it by default, but i cannot change the format of messages. It sends to CloudWatch
Api Gateway works as proxy
2019-03-15 13:31:22.248 (REQ_ID) Method completed with status: 200
2019-03-15 13:31:22.248 (REQ_ID) Successfully completed execution
2019-03-15 13:31:22.248 (REQ_ID) Method response headers:
{Cache-Control=max-age=0, private, must-revalidate,
Content-Type=application/json; charset=utf-8, Date=Fri, 15 Mar 2019
13:31:22 GMT, ETag=W/"607046c7bacdeee5e27e99f48fa2e053",
Server=nginx/1.12.1 + Phusion Passenger 4.0.60, Status=200 OK,
Vary=Accept-Encoding, Origin, X-Content-Type-Options=nosniff,
X-Frame-Options=SAMEORIGIN, X-Powered-By=Phusion Passenger 4.0.60,
X-Request-Id=88c8f3c2-0a25-4445-9010-30d4753b855a, X-Runtime=0.030736,
X-XSS-Protection=1; mode=block, Connection=keep-alive}
2019-03-15 13:31:22.248 (REQ_ID) Method response body after
transformations: {"success":1,"message":"Token is invalid"}
2019-03-15 13:31:22.248 (REQ_ID) Endpoint response headers:
{Cache-Control=max-age=0, private, must-revalidate,
Content-Type=application/json; charset=utf-8, Date=Fri, 15 Mar 2019
13:31:22 GMT, ETag=W/"607046c7bacdeee5e27e99f48fa2e053",
Server=nginx/1.12.1 + Phusion Passenger 4.0.60, Status=200 OK,
Vary=Accept-Encoding, Origin, X-Content-Type-Options=nosniff,
X-Frame-Options=SAMEORIGIN, X-Powered-By=Phusion Passenger 4.0.60,
X-Request-Id=88c8f3c2-0a25-4445-9010-30d4753b855a, X-Runtime=0.030736,
X-XSS-Protection=1; mode=block, transfer-encoding=chunked,
Connection=keep-alive}
2019-03-15 13:31:22.248 (REQ_ID) Endpoint response body before
transformations: {"success":1,"message":"Token is invalid"}
2019-03-15 13:31:22.248 (REQ_ID) Received response. Integration
latency: 43 ms
2019-03-15 13:31:22.205 (REQ_ID) Sending request to
https://proxy.domain.com/api/endpoint
2019-03-15 13:31:22.205 (REQ_ID) Endpoint request body after
transformations: {"message":"hello world"}
2019-03-15 13:31:22.205 (REQ_ID) Endpoint request headers:
{x-amzn-apigateway-api-id=API, User-Agent=curl/7.54.0,
X-Forwarded-Proto=https, X-Forwarded-For=195.24.159.254,
content-type=application/json, X-Forwarded-Port=443,
X-Amzn-Trace-Id=Root=1-5c8ba92a-7fb7fa94b9991bb8f1561d55, accept=/}
2019-03-15 13:31:22.205 (REQ_ID) Endpoint request URI:
https://proxy.domain.com/api/endpoint
2019-03-15 13:31:22.119 (REQ_ID) Method request body before
transformations: {"message":"hello world"}
2019-03-15 13:31:22.119 (9f76246a-4726-11e9-a18d-25bda2ff1f7b) Method
request headers: {User-Agent=curl/7.54.0, X-Forwarded-Proto=https,
X-Forwarded-For=195.24.159.254, content-type=application/json,
Host=api.execute-api.eu-west-1.amazonaws.com, X-Forwarded-Port=443,
X-Amzn-Trace-Id=Root=1-5c8ba92a-7fb7fa94b9991bb8f1561d55, accept=/}
2019-03-15 13:31:22.119 (REQ_ID) Method request query string: {}
2019-03-15 13:31:22.119 (REQ_ID) Method request path:
{proxy=api/endpoint}
I need to send in JSON these 4 columns only: request_header, request_body, response_header, response_body to ES. Now it sends all the logs above for each request.