X-API-KEY: ********************curl --location --request PUT 'https://api.falken.ltd/api/email/preferences/manage?token=undefined' \
--header 'X-API-KEY: <api-key>' \
--header 'Content-Type: application/json' \
--data '{
"preferences": [
{
"category": "string",
"frequency": "string"
}
]
}'[
{
"category": "string",
"frequency": "string"
}
]