“接收到无效的JSON有效负载。未知的名称接收到无效的JSON有效负载。未知的名称” Google上的操作的推送通知错误（对话框）

Question

我发送了一个json消息，要求对Google进行动作推送通知（对话框）

totototo是我具有向我发送用户ID的Google助手许可的意图的名称。

这是我发送的json：

{
    "customPushMessage": {
        "userNotification": {
            "title": "totototo",
            "text": "Simple Text"
        },
        "target": {
            "userId": "ABwppHG0NJdKbS4wz__dL2Rlj6grOkJ9LfyGk2XDgW2Z960AwGR7znl5pX1rM76ffaZKkoOAO",
            "intent": "totototo",
            "locale": "fr-CA"
        }
    }, "isInSandbox": "true"
}

我也尝试过使用此json，但我遇到了相同的错误：

{
    "customPushMessage": {
        "userNotification": {
            "title": "totototo",
            "text": "Simple Text"
        },
        "target": {
            "userId": "ABwppHG0NJdKbS4wz__dL2Rlj6grOkJ9LfyGk2XDgW2Z960AwGR7znl5pX1rM76ffaZKkoOAO",
            "intent": "totototo",
            "locale": "fr-CA"
        }
    }
}

这是我收到的错误：

{ 
   "error":{ 
      "code":400,
      "message":"Invalid JSON payload received. Unknown name \"{ \"customPushMessage\": { \"userNotification\": { \"title\": \"totototo\", \"text\": \"Simple Text\" }, \"target\": { \"userId\": \"ABwppHG0NJdKbS4wz__dL2Rlj6grOkJ9LfyGk2XDgW2Z960AwGR7znl5pX1rM76ffaZKkoOAO\", \"intent\": \"totototo\", \"locale\": \"fr-CA\" } }, \"isInSandbox\": \"true\"}\": Cannot bind query parameter. Field '{ \"customPushMessage\": { \"userNotification\": { \"title\": \"totototo\", \"text\": \"Simple Text\" }, \"target\": { \"userId\": \"ABwppHG0NJdKbS4wz__dL2Rlj6grOkJ9LfyGk2XDgW2Z960AwGR7znl5pX1rM76ffaZKkoOAO\", \"intent\": \"totototo\", \"locale\": \"fr-CA\" } }, \"isInSandbox\": \"true\"}' could not be found in request message.",
      "status":"INVALID_ARGUMENT",
      "details":[ 
         { 
            "@type":"type.googleapis.com/google.rpc.BadRequest",
            "fieldViolations":[ 
               { 
                  "description":"Invalid JSON payload received. Unknown name \"{ \"customPushMessage\": { \"userNotification\": { \"title\": \"totototo\", \"text\": \"Simple Text\" }, \"target\": { \"userId\": \"ABwppHG0NJdKbS4wz__dL2Rlj6grOkJ9LfyGk2XDgW2Z960AwGR7znl5pX1rM76ffaZKkoOAO\", \"intent\": \"totototo\", \"locale\": \"fr-CA\" } }, \"isInSandbox\": \"true\"}\": Cannot bind query parameter. Field '{ \"customPushMessage\": { \"userNotification\": { \"title\": \"totototo\", \"text\": \"Simple Text\" }, \"target\": { \"userId\": \"ABwppHG0NJdKbS4wz__dL2Rlj6grOkJ9LfyGk2XDgW2Z960AwGR7znl5pX1rM76ffaZKkoOAO\", \"intent\": \"totototo\", \"locale\": \"fr-CA\" } }, \"isInSandbox\": \"true\"}' could not be found in request message."
               }
            ]
         }
      ]
   }
}

您知道问题出在哪里吗？

谢谢