curl --request GET \
  --url https://app.autoposting.ai/api-proxy/account/export \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "downloadUrl": "https://exports.autoposting.ai/usr_01HXYZ/export-20240110.zip?signature=...",
    "expiresAt": "2024-01-11T00:00:00Z",
    "sizeBytes": 2048000
  }
}