$ curl -X POST http://localhost:18285/json_rpc -d '{"jsonrpc":"2.0","id":"0","method":"remote_data_purchase_name","params":{"saddress":"XCA","saddress_signature":"XCA","paddress":"XCA","paddress_signature":"XCA","tx_hash":"0000000000000000000000000000000000000000000000000000000000000000"}}' -H 'Content-Type: application/json'