diff --git a/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClient.scala b/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClient.scala
index 6ede8c71f70..498a78e030b 100644
--- a/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClient.scala
+++ b/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClient.scala
@@ -9,19 +9,14 @@ import org.http4s.circe.CirceEntityCodec.circeEntityEncoder
 import org.http4s.client.Client
 import org.http4s.headers.Authorization
 
-import java.util.UUID
+final case class WorkflowCallbackMessage(workflowId: String,
+                                 state: String,
+                                 outputs: Object,
+                                 failures: List[String])
 
-case class WorkflowResultMetadata(workflowId: UUID,
-                                  state: String,
-                                  outputs: Object,
-                                  failures: List[String]
-)
 trait CbasClient[F[_]] extends LazyLogging {
-  def postWorkflowResults(bearerToken: String,
-                          workflowId: UUID,
-                          state: String,
-                          outputs: Object,
-                          failures: List[String]): F[Boolean]
+  def postWorkflowResults(authHeader: Authorization,
+                          callbackMessage: WorkflowCallbackMessage): F[Boolean]
 }
 
 /*
@@ -30,33 +25,30 @@ trait CbasClient[F[_]] extends LazyLogging {
  */
 class CbasClientImpl[F[_]: Concurrent](client: Client[F], baseUrl: Uri) extends CbasClient[F] {
   val apiVersion = "v1"
- implicit val workflowResultMetadataEncoder: Encoder[WorkflowResultMetadata] = Encoder.forProduct4(
+
+  implicit val workflowCallbackMessageEncoder: Encoder[WorkflowCallbackMessage] = Encoder.forProduct4(
     "workflowId",
     "state",
     "outputs",
     "failures"
   )(x => (x.workflowId, x.state, x.outputs.toString, x.failures))
-  implicit val resourceMetadataRequestEntityEncoder: EntityEncoder[F, WorkflowResultMetadata] = circeEntityEncoder[F, WorkflowResultMetadata]
-  override def postWorkflowResults(bearerToken: String,
-                                    workflowId: UUID,
-                                   state: String,
-                                   outputs: Object,
-                                   failures: List[String]): F[Boolean] = {
-    val body = WorkflowResultMetadata(workflowId = workflowId, state = state, outputs = outputs, failures = failures)
-    val entityBody: EntityBody[F] = EntityEncoder[F, WorkflowResultMetadata].toEntity(body).body
-    val request = Request[F](uri = baseUrl / "api" / "batch"/ apiVersion / "runs" / "results", method=Method.POST, body=entityBody)
-      .putHeaders(
-        Authorization(Credentials.Token(AuthScheme.Bearer, bearerToken)),
-        org.http4s.headers.`Content-Type`(MediaType.application.json)
-    )//org.http4s.headers.`Authorization`(Credentials.Token(AuthScheme.Bearer, bearerToken))
-
-        client.run(request).use { resp =>
-        resp.status match {
-          case Status.Ok => true.pure[F]
-          case Status.InternalServerError => false.pure[F]
-          case _ => UnknownError.raiseError
-        }
+
+  override def postWorkflowResults(authHeader: Authorization,
+                                   callbackMessage: WorkflowCallbackMessage): F[Boolean] = {
+    val body = callbackMessage
+    val entityBody: EntityBody[F] = EntityEncoder[F, WorkflowCallbackMessage].toEntity(body).body
+    val request = Request[F](uri = baseUrl / "api" / "batch" / apiVersion / "runs" / "results", method = Method.POST, body = entityBody)
+      .withHeaders(
+        org.http4s.headers.`Content-Type`(MediaType.application.json),
+        authHeader
+      )
+    client.run(request).use { resp =>
+      resp.status match {
+        case Status.Ok => true.pure[F]
+        case Status.InternalServerError => false.pure[F]
+        case _ => UnknownError.raiseError
       }
+    }
   }
 }
 
diff --git a/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/Helper.scala b/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/Helper.scala
index 03577a4a690..1d19a587e59 100644
--- a/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/Helper.scala
+++ b/pact4s/src/main/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/Helper.scala
@@ -123,6 +123,7 @@ object PactHelper {
       .body(responseBody)
 
   def buildInteraction(builder: PactDslWithProvider,
+                       state: String,
                        uponReceiving: String,
                        method: String,
                        path: String,
@@ -131,11 +132,12 @@ object PactHelper {
                        status: Int,
                       ): PactDslResponse =
     builder
+      .`given`(state)
       .uponReceiving(uponReceiving)
       .method(method)
       .path(path)
-      .body(requestBody)
       .headers(scala.jdk.CollectionConverters.MapHasAsJava(requestHeaders.toMap).asJava)
+      .body(requestBody)
       .willRespondWith()
       .status(status)
 
diff --git a/pact4s/src/test/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClientSpec.scala b/pact4s/src/test/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClientSpec.scala
index 04f6c59e51a..ff552c88130 100644
--- a/pact4s/src/test/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClientSpec.scala
+++ b/pact4s/src/test/scala/org/broadinstitute/dsde/workbench/cromwell/consumer/CbasClientSpec.scala
@@ -6,14 +6,14 @@ import au.com.dius.pact.consumer.{ConsumerPactBuilder, PactTestExecutionContext}
 import au.com.dius.pact.core.model.RequestResponsePact
 import cats.effect.IO
 import org.broadinstitute.dsde.workbench.cromwell.consumer.PactHelper._
-import org.http4s.Uri
 import org.http4s.blaze.client.BlazeClientBuilder
 import org.http4s.client.Client
+import org.http4s.headers.Authorization
+import org.http4s.{AuthScheme, Credentials, Uri}
 import org.scalatest.flatspec.AnyFlatSpec
 import org.scalatest.matchers.should.Matchers
 import pact4s.scalatest.RequestResponsePactForger
 
-import java.util.UUID
 import java.util.concurrent.Executors
 import scala.concurrent.ExecutionContext
 
@@ -30,8 +30,6 @@ class CbasClientSpec extends AnyFlatSpec with Matchers with RequestResponsePactF
 
   val bearerToken = "my-token"
   val workflowId = "33333333-3333-3333-3333-333333333333"
-  val workspaceId = "44444444-3333-3333-3333-333333333333"
-
   val state = "Aborted"
   val outputs = "[]"
   val failures = List.empty[String]
@@ -56,6 +54,7 @@ class CbasClientSpec extends AnyFlatSpec with Matchers with RequestResponsePactF
 
   var pactDslResponse: PactDslResponse = buildInteraction(
     pactProvider,
+    state = "post workflow results",
     uponReceiving = "Request to post workflow results",
     method = "POST",
     path = "/api/batch/v1/runs/results",
@@ -69,9 +68,12 @@ class CbasClientSpec extends AnyFlatSpec with Matchers with RequestResponsePactF
     BlazeClientBuilder[IO](ExecutionContext.global).resource.allocated.unsafeRunSync()._1
   }
 
-  it should "post workflow results" in {
+  it should "successfully post workflow results" in {
     new CbasClientImpl[IO](client, Uri.unsafeFromString(mockServer.getUrl))
-      .postWorkflowResults(bearerToken, UUID.fromString(workflowId), state, outputs, failures)
+      .postWorkflowResults(
+        Authorization(Credentials.Token(AuthScheme.Bearer, bearerToken)),
+        WorkflowCallbackMessage(workflowId, state, Map.empty, failures)
+      )
       .attempt
       .unsafeRunSync() shouldBe Right(true)
   }