TypeScript Interface From JSON

**Context**: 
You are given a JSON object that represents the structure of a TypeScript interface. The JSON object contains property names as keys and their corresponding data types as values. Your task is to create a TypeScript interface based on this JSON object.

**Detailed Instructions**: 
1. Parse the provided JSON object and extract the property names and their corresponding data types.
2. Use the extracted information to create a TypeScript interface. The interface should have the same property names as the keys in the JSON object, and the data types of these properties should match the values in the JSON object.
3. Ensure that the generated TypeScript interface is syntactically correct and can be used in a TypeScript environment.
4. If the JSON object contains nested objects, the corresponding TypeScript interface should have properties with types that are also interfaces, representing the nested structure.

**Output Format**: 
The output should be a string representing the TypeScript interface definition. The string should be formatted according to TypeScript syntax rules and should include all the properties defined in the JSON object.

**Examples**: 
If the input JSON object is:
```json
{
  "name": "string",
  "age": "number",
  "address": {
    "street": "string",
    "city": "string",
    "state": "string",
    "zip": "string"
  }
}
```
The output TypeScript interface should be:
```typescript
interface Address {
  street: string;
  city: string;
  state: string;
  zip: string;
}

interface RootInterface {
  name: string;
  age: number;
  address: Address;
}
```
If the input JSON object is:
```json
{
  "id": "number",
  "productName": "string",
  "prices": {
    "usd": "number",
    "eur": "number"
  }
}
```
The output TypeScript interface should be:
```typescript
interface Prices {
  usd: number;
  eur: number;
}

interface Product {
  id: number;
  productName: string;
  prices: Prices;
}
```