Firebase how to upload an object correctly?

Question

firebase

Good afternoon, I’m slowly continuing to learn and pick firebase, the question arose of how to load an object correctly in firebase.database(), of this format:

{
0: {name: 'John', age: 23}, 
1: {name: 'Bob', age: 25},
.... // и далее около 400 позиций
}

Thank you very much in advance!!!