Logstash version is 5.5
Sample test log . End of the message has landingURL with multiple values.
{"StreamMessageContext":{"app":"Test","serverIP":"10.207.170.38","instanceName":"defaultDomain","correlationId":"EAS-AND-F0BBDC86-ED3A-4B62-8A49-FC3088B83C9C"},"EventStreamData":{"status":1,"httpStatus":200,"dispositionCode":1,"eventName":"5000027","requestContext":{"pragmaNoStore":false,"requestCookies":[],"vipUrlHostPortPrefix":"http://api-it.cloud.example.com:443","policyDecisionPoint":"eAPI_PDP","oauth2ResourceOwnerUID":"UNDEFINED","pragmaNoCache":true,"userId":"ANONYMOUS","rsaCorrelationId":"UNDEFINED","eventEndTime":"2017-08-08 13:20:11.663 +00:00","clientIP":"10.207.170.38","eventStartTime":"2017-08-08 13:20:11.182 +00:00","webAnalyticsCorrelationId":"|","applicationCode":"ISSO","domainName":"defaultDomain","correlationId":"EAS-AND-F0BBDC86-ED3A-4B62-8A49-FC3088B83C9C","applicationName":"customers-logins-app","allRequestHeaders":{"accept":["application/json;v=4"],"accept-encoding":["gzip"],"accept-language":["en-us"],"api-key":["MOBILE"],"cache-control":["no-cache"],"channel-type":["MOBILE"],"client-correlation-id":["EAS-AND-F0BBDC86-ED3A-4B62-8A49-FC3088B83C9C"],"client-ip":["10.207.45.231"],"client_id":["0cdca3b725074d359841e1f9a067d29b"],"connection":["keep-alive"],"content-length":["2500"],"content-type":["application/json"],"correlation-id":["F0BBDC86-ED3A-4B62-8A49-FC3088B83C9C"],"country-code":["US"],"ct_request_id":["82152"],"customer-ip-address":["10.207.45.231"],"device-id":["774random7device2id4"],"edge-context-id":["396334eb-4cea-4990-9517-a2824a932609"],"endpoint_id":["6617a32ac9e24ef6b4eee3bb3686a134"],"forwarded":["for=10.207.32.121;proto=https;host:443=api-it.cloud.example.com"],"host":["it.example.com"],"pragma":["no-cache"],"user-agent":["Dalvik/2.1.0 (Linux; U; Android 5.1; XT1032 Build/LMY47M.M005)"],"x-apigw-app-id":["9d95ebde6aa64208a45b0c4b5bc6b944"],"x-apigw-key":["CapiOne-IT-INT-10.207.175.150"],"x-apigw-origin-client-id":["0cdca3b725074d359841e1f9a067d29b"],"x-apigw-resolved-upstream-env":["QA"],"x-apigw-upstream-backend-id":["9562ad1a-4cf8-4e4b-9e17-0e62741577c7"],"x-client-id":["0cdca3b725074d359841e1f9a067d29b"],"x-forwarded-cn":["rtmqa-client.example.com"],"x-forwarded-for":["10.207.45.231, 10.207.55.131, 10.207.32.121, 10.207.175.150"],"x-forwarded-host":["api-it.cloud.example.com"],"x-forwarded-port":["443"],"x-forwarded-proto":["https"],"x-forwarded-server":["Mobile-e-qa-cr-mobile-ip-10-207-53-103.dqa.example.com"],"x-message-id":["10.207.175.150-c823e8a4-9dd7-4a0e-a303-8d3d1ef34670","10.207.175.150-c823e8a4-9dd7-4a0e-a303-8d3d1ef34670"],"x-newrelic-id":["UAUGV1JRGwEEV1hQAgg="],"x-real-ip":["10.207.32.121"]},"locale":"en_US","messageId":"10.207.175.150-c823e8a4-9dd7-4a0e-a303-8d3d1ef34670","notNull":true},"args":{"customerLoginRequest":{"username":"Bx5sJaLDNFMcrUOp7bENhTNeXyOZFte+kkPhw5uoiKoMWQIQwd+C5d0edJ6d0kczKl8UfpzgjIptHxJ9c7wU8H/9aKnO4WSq1lRayD72anbYPjuHYFOsYqNJWdwnBvpImp+b+BkKBlwN8SyoklR2b0znwNWa1XKsuJka77Yb5jc=","authenticationMethod":"Password","authenticationMode":"Authenticate","device":{"authenticationDeviceId":"hO9MgzRiAycCZgacosGV3Z+kGlVAR8HxLmGL2p4VXwXVzeQYuyanyfRAFJ8DTxqU2jqSqp7ndxJ6fLJdNSzAAD8VgYpIZ3nsE9baEWECRxLFoX2glB2WM7FuLfr7+tMCR6JRvkn1V36AOuG9XtdCRy5mc81tdvIiEeoXk8WtB5kJDtMSrzp4xU3bCV1GfLz3FuEdsFLk/8nyKRITwel13esYXdbMFj6mMaBCK7+/4ovwALi2i4AgGx0OoRoCrafq0qy76JZdMFVoLwCN7jHW/7w1PbjtYKnMGwASIjZR/14I/KhkdXK9+RZ3hIIds0EGRGP2RvJWxoDnoFXmHtDvaA==","deviceModel":"XT1032","devicePlatform":"android","deviceType":"Android","deviceOperatingSystem":"android","deviceOperatingSystemVersion":"5.1","deviceNickname":"falcon_umts","appName":"com.capitalone.mobilebanking.dev.debug","appVersion":"1613230500","appEnvironment":"android"},"riskAssessment":{"mobile":{"mobileSdkInfo":"{"TIMESTAMP":"2016-08-17T15:24:37Z","HardwareID":"359278059115484","DeviceModel":"XT1032","MultitaskingSupported":true,"DeviceName":"falcon_umts","DeviceSystemName":"Android","DeviceSystemVersion":"22","Languages":"en","WiFiMacAddress":"14:30:c6:f4:a6:24","ScreenSize":"720x1184","RSA_ApplicationKey":"155DF45852AC5535347F2CCF9B9D02DF","OS_ID":"774random7device2id4","SDK_VERSION":"2.0.1","Compromised":0,"Emulator":0,"OperatorName":"","OperatorCode":"","OperatorISO":"","SimCountryCode":"","SimOperator":""}","deviceSdkInfo":"{"TIMESTAMP":"2016-08-17T15:24:37Z","HardwareID":"359278059115484","DeviceModel":"XT1032","MultitaskingSupported":true,"DeviceName":"falcon_umts","DeviceSystemName":"Android","DeviceSystemVersion":"22","Languages":"en","WiFiMacAddress":"14:30:c6:f4:a6:24","ScreenSize":"720x1184","OS_ID":"774random7device2id4","SDK_VERSION":"1.0.0","Compromised":0,"Emulator":0,"OperatorName":"","OperatorCode":"","OperatorISO":"","SimCountryCode":"","SimOperator":""}","universalDeviceIdentifier":"774random7device2id4"}},"sessionId":"EAS-AND-F0BBDC86-ED3A-4B62-8A49-FC3088B83C9C"}},"response":{"profileReferenceId":"4dWFRyIdC188NMLK+tMB3NKEgRrHO1f556/y0pEiwuIm1nBkLzSj6HountD4y8ve","platforms":[{"platformCode":"Test1"},{"platformCode":"Test2"},{"platformCode":"Test3"},{"platformCode":"Test4"},{"platformCode":"Test5"}],"landingURL":[{"landingPlatformCode":"AVAILABLE_PRODUCTS","landingPlatformURL":"https://verified-it.example.com/sic-ui/#/pathFinder"},{"landingPlatformCode":"360BANK","landingPlatformURL":"https://secure-qa2.int.example360qa.com/myaccount/banking/postlogin"},{"landingPlatformCode":"CTRACKER","landingPlatformURL":"https://preprod-creditwise.example.com/#/authenticated"},{"landingPlatformCode":"CARD","landingPlatformURL":"https://cosqa4.example.com/accounts/?initial_login=true"},{"landingPlatformCode":"OLBANK","landingPlatformURL":"https://olbrqa5.example.com/olb-web/entry"}],"loginStatus":"SUCCESS","ssoId":"310d8fdc98b647f5d9f8c3d831a28892","mobileOnly":false}}}