Root issue example, updating multiple block states.

example.js

const fetch = require("node-fetch");

const url =
    "https://sandbox.uk.rootplatform.com/v1/insurance/claims/claim-id-here/blocks";

// This is incorrect:
let options = {
    method: "PATCH",
    headers: { accept: "application/json", "content-type": "application/json" },
    body: JSON.stringify({
        key: "first_example_block",
        type: "input.text",
        newKey: "New Value",
        "newKey-1": "New Value",
        "newKey-2": "New Value"
    })
};

// This is correct:
options = {
    method: "PATCH",
    headers: { accept: "application/json", "content-type": "application/json" },
    body: JSON.stringify([
        {
            key: "first_example_block",
            block_state: {
                type: "input.text",
                value: "New value"
            }
        },
        {
            key: "second_example_block",
            block_state: {
                type: "input.text",
                value: "Other New value"
            }
        }
    ])
};

fetch(url, options)
    .then(res => res.json())
    .then(json => console.log(json))
    .catch(err => console.error("error:" + err));