Data array

var dataArray = [
    { name: 'Alberta Owen', id: 1 },
    { name: 'Jimmy Murphy', id: 2 },
    { name: 'Jerald Roberson', id: 3 },
    { name: 'Roosevelt Douglas', id: 4 },
    { name: 'Mark Ramsey', id: 5 }
]

Sort array

var sortArray = ['Mark Ramsey', 'Jimmy Murphy', 'Alberta Owen'];

Sorting

dataArray.sort((a, b) => sortArray.indexOf(a) - sortArray.indexOf(b));

The sample JSON file content (data.json):

[
  {
    "FirstName": "Joe",
    "UserId": 1
  },
  {
    "FirstName": "Jack",
    "UserId": 2
  }
]

Next, add appropriate resolveJsonModule entry to tsconfig.json entry

{
    "compilerOptions": {  
      "esModuleInterop": true
      "resolveJsonModule": true
    } 
}

Finally, import the data and access it using the below code.

import data from './data.json';

interface Person{
    FirstName: string,
    UserId: number,
}

const userArray:User[] = data as User[];