Add project files.

Gateway/Models/ExecutionRequest.cs

@@ -0,0 +1,22 @@
+using System.Text.Json;
+
+namespace Gateway.Models
+{
+    public sealed class ExecutionRequest
+    {
+        /// <summary>Ad platform provider: google, meta, msads, etc.</summary>
+        public string Provider { get; set; } = "google";
+
+        /// <summary>Sub-module/microservice: system, campaigns, reporting, accounts, etc.</summary>
+        public string Service { get; set; } = "system";
+
+        /// <summary>Specific operation/action: ping, create, list, get, update, delete, etc.</summary>
+        public string Action { get; set; } = "ping";
+
+        /// <summary>Tenant/Customer ID for account context</summary>
+        public string? TenantId { get; set; }
+
+        /// <summary>Raw JSON payload for the operation</summary>
+        public JsonElement Payload { get; set; }
+    }
+}