curl -X 'POST' \
  'https://api.subiekt123.pl/1.0/clients?subscription-key=6592da9bca984e29b5b1cd13ac13b8a1' \
  -H 'accept: application/json' \
  -H 'x-api-version: 1.0' \
  -H 'Ocp-Apim-Subscription-Key: 6592da9bca984e29b5b1cd13ac13b8a1' \
  -H 'Content-Type: application/json' \
  -d '{
  "address": {
    "city": "string",
    "country": "string",
    "line1": "string",
    "name": "string",
    "zipCode": "string"
  },
  "associatedClient": true,
  "bankAccounts": [
    {
      "bankName": "string",
      "default": true,
      "number": "string"
    }
  ],
  "buyerId": 0,
  "defaultDiscount": 0,
  "defaultDueDate": 0,
  "defaultPaymentMethod": "Cash",
  "deliveryAddress": {
    "city": "string",
    "country": "string",
    "line1": "string",
    "name": "string",
    "zipCode": "string"
  },
  "emails": [
    "string"
  ],
  "favourite": true,
  "group": "string",
  "kind": "Company",
  "name": "string",
  "note": "string",
  "phone1": "string",
  "phone2": "string",
  "skype": "string",
  "tin": "string",
  "tinKind": "Nip",
  "website": "string"
}'