Buyer

{
    "taxAddress": {
        "city": "string",
        "countryCode": "string",
        "postalCode": "string",
        "stateOrProvince": "string"
    },
    "taxIdentifier": {
        "issuingCountry": "string",
        "taxIdentifierType": "string",
        "taxpayerId": "string"
    },
    "username": "string"
}