curl --compressed

curl -X POST -H "Content-Type: application/json" --compressed --data 
'{"jsonrpc":"2.0","method":"debug_traceBlockByNumber","params":["0x12345",{"enableMemory":false,"disableStack":false,"disableStorage":false,"enableReturnData":true}],"id":1}' http://YOUR-RPC-ENDPOINT:8545 

cURL, curl -s, -X, -x, curl -T, curl --help, curl -L, curl -o, curl -X POST, curl -d, curl --header, curl -I, curl --silent, curl -Is, curl -k or curl --insecure, curl -XPUT, curl -d, ~/.curlrc, curl -i, curl --version, curl --help