curl --request POST \
  --url https://api.sandbox.zafapay.com/v1/customers/payment-methods/{id}/block \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "reason": "不正利用の疑い"
}
'

{
  "id": "pmi_abc123",
  "status": "blocked",
  "blocked_reason": "不正利用の疑い",
  "updated_at": "2024-01-15T10:35:00Z"
}