{
"currency": "BTC",
"leverage": "5"
}curl --location --request POST 'https://api.kucoin.com/api/ua/v1/unified/account/modify-leverage-margin-cross' \
--header 'Content-Type: application/json' \
--data-raw '{
"currency": "BTC",
"leverage": "5"
}'{"code":"200000","data":{"currency":"BTC","leverage":"5"}}