Example defined fieldset retrieve

field-jsonapi-customers.json

{
  "data": [
    {
      "type": "customers",
      "id": "1",
      "attributes": {
        "first_name": "Fancie",
        "last_name": "Yglesia",
        "account_no": "3559891215235202",
        "balance": "256.34",
      },
      "relationships": {},
      "links": {
        "self": "/v2/customers/1"
      }
    },
    {
      "type": "customers",
      "id": "2",
      "attributes": {
        "first_name": "Blancha",
        "last_name": "Kroon",
        "account_no": "3530646602541099",
        "balance": "571.91",
      },
      "relationships": {},
      "links": {
        "self": "/v2/customers/2"
      }
    }
  ]
}