$ git clone https://github.com/anoopmundathan/restful-web-api.git
$ cd restful-web-api

$ npm i

$ node server.js

curl -X "POST" "http://localhost:8000/block" -H 'Content-Type: application/json' -d $'{"body":"test data"}'

{
    "hash": "e6e67132bafc539556bf70b120ae1dc4d429a53a331f85acfcb5044609e159ee",
    "height": 0,
    "body": "test data",
    "time": "1539811189",
    "previousBlockHash": ""
}

curl http://localhost:8000/block/0

{
    "hash": "e6e67132bafc539556bf70b120ae1dc4d429a53a331f85acfcb5044609e159ee",
    "height": 0,
    "body": "test data",
    "time": "1539811189",
    "previousBlockHash": ""
}