ctrl.php

<?php

class CustomerAffiliationController extends BaseController
{
	public function index($customer_id)
	{
		$affiliations = Affiliation::with("AffiliationCategory", "Organism")->where("customer_id","=", $customer_id)->get();
		return $affiliations;
	}

	public function store($customer_id)
	{
		$input = Input::json();
		$customer = Customer::find($customer_id);
		$customer->affiliations()->sync($input);
		$customer->save();

		return '';//Response::eloquent($customer);
	}
}

headerData.json

{
  	"1": {"affiliation_category_id":7,"started_at_year":2015},
  	"2": {"affiliation_category_id":8,"started_at_year":2016}
}