curl --location --request POST 'https://partner-api-stage.p100.io/v1/user/balances/crypto-and-fiat' \
--header 'x-api-key: <api-key>' \
--header 'Content-Type: application/json' \
--data-raw '{
"externalUserId": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
"email": "john.smith@example.com",
"phone": "14155552671",
"firstName": "John",
"lastName": "Smith",
"street": "Main Street",
"number": "123",
"city": "London",
"postCode": "SW1A 1AA",
"country": "GB",
"citizenship": "GB",
"nationality": "GB",
"birthCountry": "GB",
"birthDate": "1998-08-03"
}'