keypadInput => sendKey command is not working via the smartThings API for Samsung Smart TV

Devices & Integrations Connected Things
,
1

I want to use sendKey command of keypadInput capabilities to control Samsung smart TV via the SmartThings API.

TV Model - UA55DU8300ULXL

Here is the full detail of keypadInput capability - https://developer.smartthings.com/capabilities/keypadInput

{
  "name": "Keypad Input",
  "status": "live",
  "attributes": {
    "supportedKeyCodes": {
      "schema": {
        "type": "object",
        "properties": {
          "value": {
            "type": "array",
            "items": {
              "type": "string",
              "enum": [
                "UP",
                "DOWN",
                "LEFT",
                "RIGHT",
                "SELECT",
                "BACK",
                "EXIT",
                "MENU",
                "SETTINGS",
                "HOME",
                "NUMBER0",
                "NUMBER1",
                "NUMBER2",
                "NUMBER3",
                "NUMBER4",
                "NUMBER5",
                "NUMBER6",
                "NUMBER7",
                "NUMBER8",
                "NUMBER9"
              ]
            }
          }
        },
        "additionalProperties": false,
        "required": [
          "value"
        ]
      }
    }
  },
  "commands": {
    "sendKey": {
      "name": "sendKey",
      "arguments": [
        {
          "name": "keyCode",
          "schema": {
            "type": "string",
            "enum": [
              "UP",
              "DOWN",
              "LEFT",
              "RIGHT",
              "SELECT",
              "BACK",
              "EXIT",
              "MENU",
              "SETTINGS",
              "HOME",
              "NUMBER0",
              "NUMBER1",
              "NUMBER2",
              "NUMBER3",
              "NUMBER4",
              "NUMBER5",
              "NUMBER6",
              "NUMBER7",
              "NUMBER8",
              "NUMBER9"
            ]
          },
          "optional": false
        }
      ]
    }
  },
  "id": "keypadInput",
  "version": 1
}