Load JSON Schema to Elastic Search

I am working with Elastic Search v 5.6.16 . I want to provide the JSON schema to the ES and than load the data as per this schema to ES and get back result as List.
Please help out how to proceed with this

With schema, are you referring to mapping or index templates?

What do you mean with this? What is your use case?

I have a JSON let say
{
"Students" :[{
"name":"",
"age":""
}]}

I want to load this schema to the ES JSON so that ES would take data according to this and will return the List of Documents. List