nft commands:
-----
% nft add table my_filter_table
% nft add chain my_filter_table my_input_chain {type filter hook input priority 0\;}
% nft add set my_filter_table my_ssh_meter { type ipv4_addr\; flags dynamic \;}
% nft add rule my_filter_table my_input_chain tcp dport 22 ct state new add @my_ssh_meter { ip saddr limit rate 10/second } accept

Error:
---
Error: syntax error, unexpected saddr, expecting comma or '}'
add rule filter input tcp dport 22 ct state new @my_ssh_meter { ip saddr limit rate 10/second } accept
                                                                     ^^^^^