method:call should be long time gone
Condenser is still broadcasting transactions using:
"method":"call","params":["condenser_api","broadcast_transaction_synchronous"
it should use at very least:
"method":"condenser_api.broadcast_transaction_synchronous"
but preferred way of doing things is to use either:
"method":"network_broadcast_api.broadcast_transaction"
or
"method":"condenser_api.broadcast_transaction"
in conjunction with transaction_status_api.transaction_status
see: https://developers.hive.io/apidefinitions/#condenser_api.broadcast_transaction