Response: {
"error": "Every operation need 'account_name= <account name>'except if you received a 'pay_id', then just use it, 'pay_id = <received pay_id> optionaly with 'cancel = true' to deny the payment. To initiate a payment, define 'pay_to' and 'amount'. To create a new account, add users with 'add_user = <address>' multiple times then 'activate_account = true' and choose 'hierarchical/flat = true'."
}