diff --git a/lambda/src/main/scala/pricemigrationengine/model/ZuoraAmendmentOrderPayload.scala b/lambda/src/main/scala/pricemigrationengine/model/ZuoraAmendmentOrderPayload.scala
new file mode 100644
index 000000000..a3cd2c52a
--- /dev/null
+++ b/lambda/src/main/scala/pricemigrationengine/model/ZuoraAmendmentOrderPayload.scala
@@ -0,0 +1,76 @@
+package pricemigrationengine.model
+
+import java.time.LocalDate
+import upickle.default.{ReadWriter, macroRW}
+
+// Zuora documentation: https://knowledgecenter.zuora.com/Zuora_Billing/Manage_subscription_transactions/Orders/Order_actions_tutorials/D_Replace_a_product_in_a_subscription
+
+sealed trait ZuoraAmendmentOrderPayloadOrderAction
+object ZuoraAmendmentOrderPayloadOrderAction {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadOrderAction] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadOrderActionTriggerDate(name: String, triggerDate: LocalDate)
+object ZuoraAmendmentOrderPayloadOrderActionTriggerDate {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadOrderActionTriggerDate] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadOrderActionRemoveProduct(ratePlanId: String)
+object ZuoraAmendmentOrderPayloadOrderActionRemoveProduct {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadOrderActionRemoveProduct] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadOrderActionRemove(
+    triggerDates: List[ZuoraAmendmentOrderPayloadOrderActionTriggerDate],
+    removeProduct: ZuoraAmendmentOrderPayloadOrderActionRemoveProduct
+) extends ZuoraAmendmentOrderPayloadOrderAction
+object ZuoraAmendmentOrderPayloadOrderActionRemove {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadOrderActionRemove] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadOrderActionAddProductChargeOverride(
+    productRatePlanChargeId: String,
+    pricing: Map[String, Map[String, BigDecimal]]
+)
+object ZuoraAmendmentOrderPayloadOrderActionAddProductChargeOverride {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadOrderActionAddProductChargeOverride] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadOrderActionAddProduct(
+    productRatePlanId: String,
+    chargeOverrides: List[ZuoraAmendmentOrderPayloadOrderActionAddProductChargeOverride]
+)
+object ZuoraAmendmentOrderPayloadOrderActionAddProduct {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadOrderActionAddProduct] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadOrderActionAdd(
+    triggerDates: List[ZuoraAmendmentOrderPayloadOrderActionTriggerDate],
+    addProduct: ZuoraAmendmentOrderPayloadOrderActionAddProduct
+) extends ZuoraAmendmentOrderPayloadOrderAction
+object ZuoraAmendmentOrderPayloadOrderActionAdd {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadOrderActionAdd] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadSubscription(
+    subscriptionNumber: String,
+    orderActions: List[ZuoraAmendmentOrderPayloadOrderAction]
+)
+object ZuoraAmendmentOrderPayloadSubscription {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadSubscription] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayloadProcessingOptions(runBilling: Boolean, collectPayment: Boolean)
+object ZuoraAmendmentOrderPayloadProcessingOptions {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayloadProcessingOptions] = macroRW
+}
+
+case class ZuoraAmendmentOrderPayload(
+    orderDate: LocalDate,
+    existingAccountNumber: String,
+    subscriptions: List[ZuoraAmendmentOrderPayloadSubscription],
+    processingOptions: ZuoraAmendmentOrderPayloadProcessingOptions
+)
+object ZuoraAmendmentOrderPayload {
+  implicit val rw: ReadWriter[ZuoraAmendmentOrderPayload] = macroRW
+}