test(postman): update postman collection files

postman/collection-json/paypal.postman_collection.json

@@ -4,7 +4,33 @@
       "listen": "prerequest",
       "script": {
         "exec": [
-          ""
+          "const path = pm.request.url.toString();",
+          "const isPostRequest = pm.request.method.toString() === \"POST\";",
+          "const isPaymentCreation = path.match(/\\/payments$/) && isPostRequest;",
+          "",
+          "if (isPaymentCreation) {",
+          "  try {",
+          "    const request = JSON.parse(pm.request.body.toJSON().raw);",
+          "",
+          "    // Attach routing",
+          "    const routing = { type: \"single\", data: \"paypal\" };",
+          "    request[\"routing\"] = routing;",
+          "",
+          "    let updatedRequest = {",
+          "      mode: \"raw\",",
+          "      raw: JSON.stringify(request),",
+          "      options: {",
+          "        raw: {",
+          "          language: \"json\",",
+          "        },",
+          "      },",
+          "    };",
+          "    pm.request.body.update(updatedRequest);",
+          "  } catch (error) {",
+          "    console.error(\"Failed to inject routing in the request\");",
+          "    console.error(error);",
+          "  }",
+          "}"
         ],
         "type": "text/javascript"
       }