def make_payload(base, method, params):
payload = {<EOL>'<STR_LIT>': '<STR_LIT>',<EOL>'<STR_LIT>': '<STR_LIT>'.format(**locals()),<EOL>'<STR_LIT>': utils.serialize_dict(params),<EOL>'<STR_LIT:id>': <NUM_LIT:1>,<EOL>}<EOL>return payload<EOL>
Build Betfair JSON-RPC payload.

    :param str base: Betfair base ("Sports" or "Account")
    :param str method: Betfair endpoint
    :param dict params: Request parameters