curl --request POST \
--url https://tron.api.watchdata.io/wallet/createspendauthsig \
--header 'Accept: application/json' \
--header 'Content-Type: application/json' \
--data '
{
"ask": "string",
"tx_hash": "string",
"alpha": "string"
}
'
{
"Error": "class org.tron.core.services.http.JsonFormat$ParseException : 1:8: INVALID hex String"
}