curl --request POST \
  --url https://api.mixpeek.com/v1/buckets/{bucket_identifier}/uploads/batch \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'X-Namespace: <x-namespace>' \
  --data '{
  "shared_metadata": {
    "campaign": "summer_2024"
  },
  "shared_object_metadata": {
    "category": "marketing"
  },
  "uploads": [
    {
      "blob_property": "video",
      "content_type": "video/mp4",
      "filename": "video1.mp4"
    },
    {
      "blob_property": "thumbnail",
      "content_type": "image/jpeg",
      "filename": "thumbnail1.jpg"
    }
  ]
}'

{
  "total": 2,
  "uploads": [
    {
      "filename": "video1.mp4",
      "presigned_url": "https://s3.amazonaws.com/...",
      "status": "PENDING",
      "upload_id": "upl_abc123"
    }
  ]
}