curl --location -g --request POST 'http:///V1/negotiable-carts//billing-address' \
--header 'Content-Type: application/json' \
--data-raw '{
"address": {
"city": "string",
"company": "string",
"country_id": "string",
"custom_attributes": [
{
"attribute_code": "string",
"value": "string"
}
],
"customer_address_id": 0,
"customer_id": 0,
"email": "string",
"extension_attributes": {
"checkout_fields": [
{
"attribute_code": "string",
"value": "string"
}
],
"gift_registry_id": 0
},
"fax": "string",
"firstname": "string",
"id": 0,
"lastname": "string",
"middlename": "string",
"postcode": "string",
"prefix": "string",
"region": "string",
"region_code": "string",
"region_id": 0,
"same_as_billing": 0,
"save_in_address_book": 0,
"street": [
"string"
],
"suffix": "string",
"telephone": "string",
"vat_id": "string"
},
"useForShipping": true
}'