How to extract complete json in alert message


My log looks like below. From that I am able to extract each filed individually while sending alert message like (_source.Records.eventID), but how can I extract complete json? like (_source.Records) but its not working.
Here is what I am passing for message under actions.

"title": "{{#ctx.results.0.hits.hits}}{{ctx.results.0.hits.hits.}}

MESSAGE: {{_source.Records.eventID}}{{/ctx.results.0.hits.hits}}"

above configuration is working but I want complete Records filed like {{_source.Records}}. How can I achieve this?

                "_index": "test",
                "_type": "_doc",
                "_source": {
                    "@timestamp": "2020-05-03T23",
                    "@version": "1",
                    "Records": {
                        "eventID": "abdc123",
                        "awsRegion": "us-east-1",
                        "responseElements": {
                            "arn": "arn",
                            "userId": "id",
                            "account": "1234"
                        "eventVersion": "1.0",
                        "sourceIPAddress": "",
                        "eventSource": "",
                        "requestParameters": null,
                        "userAgent": "http-client",
                        "userIdentity": {
                            "sessionContext": {
                                "sessionIssuer": {
                                    "accountId": "1234",
                                    "principalId": "id",
                                    "arn": "arn:aws:iam::",
                                    "type": "Role",
                                    "userName": "name"
                                "attributes": {
                                    "mfaAuthenticated": "false",
                                    "creationDate": "2020-03-13"
                            "accessKeyId": "id",
                            "accountId": "1234",
                            "principalId": "id",
                            "type": "AssumedRole",
                            "arn": "arn:aws:sts::"
                        "eventType": "AwsApiCall",
                        "requestID": "id",
                        "eventTime": "2020-03-13T",
                        "eventName": "Identity",
                        "recipientAccountId": "1234"