Retrieves a single price rule

Example response

{
  "price_rule": {
    "created_at": "2019-03-14T16:09:54-04:00",
    "customer_selection": "prerequisite",
    "ends_at": "2019-07-19T17:59:10Z",
    "entitled_collection_ids": [
      4564654869,
      8979761006
    ],
    "entitled_country_ids": [
      6798798798,
      5675765905
    ],
    "entitled_product_ids": [
      7897397755,
      42382368242
    ],
    "id": 9808080986,
    "once_per_customer": true,
    "prerequisite_collection_ids": [
      384028349005,
      3492039843
    ],
    "prerequisite_customer_ids": [
      384028349005,
      3492039843
    ],
    "prerequisite_emails": [
      "hoaipiu@gmail.com",
      "tieumapmap@gmail.com",
      "traxanh@mtp.com"
    ],
    "prerequisite_quantity_range": {
      "greater_than_or_equal_to": 50
    },
    "prerequisite_shipping_price_range": {
      "less_than_or_equal_to": 10
    },
    "prerequisite_subtotal_range": {
      "greater_than_or_equal_to": 40
    },
    "prerequisite_variant_ids": [
      384028349005,
      3492039843
    ],
    "starts_at": "2019-04-19T17:59:10Z",
    "target_selection": "entitled",
    "target_type": "line_item",
    "title": "SUMMERSALE10OFF",
    "updated_at": "2019-03-14T16:09:54-04:00",
    "usage_limit": 10,
    "value": -60,
    "value_type": "fixed_amount"
  }
}