curl --request POST \
  --url 'https://edi.stateset.com/v1/customs/postal/{partner_id}' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "buyer": {
    "address_lines": [
      "string"
    ],
    "city": "string",
    "country": "string",
    "name": "string",
    "postal_code": "string",
    "state": "string",
    "tax_id": "string"
  },
  "currency": "string",
  "freight": "string",
  "incoterms": "string",
  "incoterms_place": "string",
  "insurance": "string",
  "invoice_date": "string",
  "invoice_number": "string",
  "lines": [
    {
      "country_of_origin": "string",
      "description": "string",
      "hs_code": "string",
      "net_weight_kg": "string",
      "quantity": "string",
      "sku": "string",
      "unit_price": "string",
      "uom": "string"
    }
  ],
  "po_number": "string",
  "reason_for_export": "string",
  "seller": {
    "address_lines": [
      "string"
    ],
    "city": "string",
    "country": "string",
    "name": "string",
    "postal_code": "string",
    "state": "string",
    "tax_id": "string"
  },
  "ship_to": {
    "address_lines": [
      "string"
    ],
    "city": "string",
    "country": "string",
    "name": "string",
    "postal_code": "string",
    "state": "string",
    "tax_id": "string"
  }
}'