diff --git a/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/AuditEvent.scala b/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/AuditEvent.scala
index c577e78..0f4a848 100644
--- a/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/AuditEvent.scala
+++ b/auditlog/src/main/scala/com/gerritforge/analytics/auditlog/model/AuditEvent.scala
@@ -1,4 +1,5 @@
 package com.gerritforge.analytics.auditlog.model
+import org.json4s.jackson.Serialization.write
 import org.json4s.native.JsonMethods._
 import org.json4s.{DefaultFormats, _}
 
@@ -6,7 +7,7 @@
 
 object AuditEvent {
 
-  implicit private val formats = DefaultFormats
+  implicit private val formats = DefaultFormats + AuditUUID.serializer + AccountId.serializer
 
   def fromJsonString(json: String): Try[AuditEvent] = {
     Try(parse(json)).flatMap { jsValueEvent =>
@@ -21,6 +22,10 @@
       }
     }
   }
+
+  def toJsonString[T <: AuditEvent](auditEvent: T): String = {
+    compact(render(parse(write[T](auditEvent)).snakizeKeys))
+  }
 }
 
 sealed trait AuditEvent {
@@ -74,4 +79,22 @@
 )
 
 final case class AccountId(id: Int)
-final case class AuditUUID(uuid: String)
\ No newline at end of file
+object AccountId {
+  val serializer = new CustomSerializer[AccountId]( _ =>
+      (
+        { case JObject(JField("id", JInt(id)) :: Nil) => AccountId(id.intValue()) },
+        { case a: AccountId => JInt(a.id) }
+      )
+  )
+}
+
+final case class AuditUUID(uuid: String)
+
+object AuditUUID {
+  val serializer = new CustomSerializer[AuditUUID]( _ =>
+      (
+        { case JObject(JField("uuid", JString(uuid)) :: Nil) => AuditUUID(uuid) },
+        { case a: AuditUUID => JString(a.uuid) }
+      )
+  )
+}
\ No newline at end of file
diff --git a/auditlog/src/test/scala/com/gerritforge/analytics/auditlog/model/AuditEventSpec.scala b/auditlog/src/test/scala/com/gerritforge/analytics/auditlog/model/AuditEventSpec.scala
index a6ec23d..82c9988 100644
--- a/auditlog/src/test/scala/com/gerritforge/analytics/auditlog/model/AuditEventSpec.scala
+++ b/auditlog/src/test/scala/com/gerritforge/analytics/auditlog/model/AuditEventSpec.scala
@@ -1,11 +1,16 @@
 package com.gerritforge.analytics.auditlog.model
+import org.json4s.JsonAST.JValue
+import org.json4s.JsonDSL._
 import org.json4s.MappingException
 import org.json4s.ParserUtil.ParseException
-import org.scalatest.{FlatSpec, Inside, Matchers}
+import org.json4s.native.JsonMethods._
 import org.scalatest.TryValues._
+import org.scalatest.{FlatSpec, Inside, Matchers}
 
 class AuditEventSpec extends FlatSpec with Matchers with Inside {
 
+  behavior of "fromJsonString"
+
   "parsing a string that is not json" should "result in a ParseException failure" in {
     val someJson = """this_is_not_a_valid_json"""
     AuditEvent.fromJsonString(someJson).failure.exception shouldBe a[ParseException]
@@ -209,4 +214,89 @@
         gotUUID.uuid   shouldBe auditUUID
     }
   }
+
+  behavior of "toJsonString"
+
+  "an HttpAuditEvent" should "be serializable into json" in {
+
+    val httpMethod = "GET"
+    val httpStatus = 200
+    val sessionId = "someSessionId"
+    val who = CurrentUser(accessPath = "UNKNOWN", accountId = None)
+    val timeAtStart = 1000L
+    val what="https://review.gerrithub.io/Mirantis/tcp-qa/git-upload-pack"
+    val elapsed = 22
+    val uuid = AuditUUID("audit:5f10fea5-35d1-4252-b86f-99db7a9b549b")
+
+    val event = HttpAuditEvent(httpMethod, httpStatus, sessionId, who, timeAtStart, what, elapsed, uuid)
+
+    val expectedJson: JValue =
+      ("http_method" -> httpMethod) ~
+        ("http_status" -> httpStatus) ~
+        ("session_id" -> sessionId) ~
+        ("who" ->
+          ("access_path" -> who.accessPath)
+        ) ~
+        ("time_at_start" -> timeAtStart) ~
+        ("what" -> what) ~
+        ("elapsed" -> elapsed) ~
+        ("uuid" -> uuid.uuid)
+
+    parse(AuditEvent.toJsonString(event)) shouldBe expectedJson
+  }
+
+  "an ExtendedHttpAuditEvent" should "be serializable into json" in {
+
+    val httpMethod = "GET"
+    val httpStatus = 200
+    val sessionId = "someSessionId"
+    val accountId = 123
+    val who = CurrentUser(accessPath = "/config/server/info", accountId = Some(AccountId(accountId)))
+    val timeAtStart = 1000L
+    val what="/config/server/info"
+    val elapsed = 22
+    val uuid = AuditUUID("audit:5f10fea5-35d1-4252-b86f-99db7a9b549b")
+
+    val event = ExtendedHttpAuditEvent(httpMethod, httpStatus, sessionId, who, timeAtStart, what, elapsed, uuid)
+
+    val expectedJson: JValue =
+      ("http_method" -> httpMethod) ~
+      ("http_status" -> httpStatus) ~
+      ("session_id" -> sessionId) ~
+      ("who" ->
+        ("access_path" -> who.accessPath) ~
+        ("account_id" -> accountId)
+      ) ~
+      ("time_at_start" -> timeAtStart) ~
+      ("what" -> what) ~
+      ("elapsed" -> elapsed) ~
+      ("uuid" -> uuid.uuid)
+
+    parse(AuditEvent.toJsonString(event)) shouldBe expectedJson
+  }
+
+  "an SshAuditEvent" should "be serializable into json" in {
+    val sessionId   = "2adc5bef"
+    val accountId   = 1009124
+    val accessPath  = "SSH_COMMAND"
+    val timeAtStart = 1542240322369L
+    val what        = "gerrit.stream-events.-s.patchset-created.-s.change-restored.-s.comment-added"
+    val elapsed     = 12
+    val auditUUID   = "audit:dd74e098-9260-4720-9143-38a0a0a5e500"
+
+    val event = SshAuditEvent(sessionId, Some(CurrentUser(accessPath, Some(AccountId(accountId)))), timeAtStart, what, elapsed, AuditUUID(auditUUID))
+
+    val expectedJson: JValue =
+      ("session_id" -> sessionId) ~
+      ("who" ->
+        ("access_path" -> accessPath) ~
+        ("account_id" -> accountId)
+      ) ~
+      ("time_at_start" -> timeAtStart) ~
+      ("what" -> what) ~
+      ("elapsed" -> elapsed) ~
+      ("uuid" -> auditUUID)
+
+    parse(AuditEvent.toJsonString(event)) shouldBe expectedJson
+  }
 }
\ No newline at end of file