curl --location --request POST 'https://proxy-api.mnee.net/v1/transfer?auth_token=92982ec1c0975f31979da515d46bae9f' \
--header 'Content-Type: application/json' \
--data-raw '{
"callback_url": "(optional) https://abcd.com",
"migration": false,
"rawtx": "base64 encoded hex"
}'{
"rawtx": "string"
}