Unable to create whatsapp media template whatsapp business api

I am unable to create media template, i am sending the request to the given url from doc /wabaId/message_templates with the request body as needed.

https://graph.facebook.com/v21.0/{wabaID}/message_templates

My Axios Request Config

  method: 'post',
  maxBodyLength: Infinity,
  url: 'https://graph.facebook.com/v21.0/{wabaID}/message_templates',
  headers: {
    'Content-Type': 'application/json',
    Authorization: 'Bearer {accessToken}'
  },
  data:{
  "name": "qwe",
  "language": "en_US",
  "category": "MARKETING",
  "components": [
    {
      "type": "HEADER",
      "format": "IMAGE",
      "example": {
        "header_handle": [ "4:MTc0MTg0NTY5NjgxMC1kb3dubG9hZF8xLmpwZw==:YXBwbGljYXRpb24vb2N0ZXQtc3RyZWFt:ARb0jzI58ebtPpiYzniZe9V1ad-KTXniKsPecBOMaNomkveFgCck0dYv8W9HsIOEfEBtuYxovCeiYPzym6f7JyFAy6z9zk5G8hi0xt97tNMKgw:e:1742534566:998952308807615:61572774039971:ARam4sOetrbq4P_uTig"
        ]
      }
    },
    {
      "type": "BODY",
      "text": "testing image"
    }
  ]
}

I am getting bad request error, its not creating template, not even from curl or postman

Whats wrong in my implementation ? I even tried from v22.0 api as well, still not working …

I have tried sending header_handle, media_handle, url, link and everything which i saw from internet, but still not working.

The current implemetation is based on the documentation provided by facebook. Please help implementing this..