To set up the card fees with the provided payload when creating an account, you can use the following example payload in metadata
"installment_config": [
{
"rate": 0,
"installment_count_max": 1
},
{
"rate": 0.0320,
"installment_count_max": 6
},
{
"rate": 0.0325,
"installment_count_max": 12
}
]