curl --request GET \
  --url https://test.deribit.com/api/v2/private/get_address_beneficiary \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 42,
  "method": "private/get_address_beneficiary",
  "params": {
    "currency": "BTC",
    "address": "bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf0uyj"
  }
}
'

{
  "jsonrpc": "2.0",
  "id": 42,
  "result": {
    "currency": "BTC",
    "address": "bc1qar0srrr7xfkvy5l643lydnw9re59gtzzwf0uyj",
    "user_id": 1016,
    "agreed": true,
    "personal": false,
    "unhosted": false,
    "beneficiary_vasp_name": "Money's Gone",
    "beneficiary_vasp_did": "did:example:123456789abcdefghi",
    "beneficiary_vasp_website": "https://example.com",
    "beneficiary_first_name": "John",
    "beneficiary_last_name": "Doe",
    "beneficiary_company_name": "Example Corp",
    "beneficiary_address": "NL, Amsterdam, Street, 1",
    "created": 1536569522277,
    "updated": 1536569522277
  }
}