interfaces.ts

interface CommonData {
    data: any;
    meta: any,
    [propName: string]: any;
}

function getCommonData(common: CommonData) {
    return common;
}

class CD implements CommonData{
    constructor(data: any, meta: any) {
        this.data = data;
        this.meta = meta;
    }
    data: any;
    meta: any;
}


// const common = getCommonData({data:"data", meta:"meta", meta1:"meta", meta2:"meta"});

const common = new CD({ data: "data" },
    {
        meta: "meta",
        meta1: "meta",
        meta2: "meta"
    });

alert(JSON.stringify(common))

https://www.typescriptlang.org/docs/handbook/interfaces.html