curl --request POST \
  --url https://api.mannco.store/payment/{provider} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "type": "balance",
  "value": 10000,
  "tos_timestamp": 1706745600,
  "payment_method": null
}
'

{
  "err": false,
  "success": true,
  "content": {
    "url": "https://payment-provider.example/checkout/..."
  }
}