I think what you are looking for is:

cleos --url https://eos.greymass.com get actions eosio.ram -1 -20

The above command would give you the last 20 transactions in the account eosio.ram

To consume the result in JSON add --json flag

cleos --url https://eos.greymass.com get actions eosio.ram -1 -20 --json

I think what you are looking for is:

cleos --url https://eos.greymass.com get actions eosio.ram -1 -20

The above command would give you the last 20 transactions in the account eosio.ram

To consume the result in JSON add --json flag

cleos --url https://eos.greymass.com get actions eosio.ram -1 -20 --json

• For more context regarding get actionssee EOS Developer Doc here: Exchange Deposit Withdraw