Example

{
    "id": 2,
    "reward_id": 2,
    "recipient_id": 4,
    "can_be_issued": true,
    "coupon": "GHFHF", // available only when reward metric is coupon
    "count": 1, // available only when reward metric is NOT coupon
    "total": 50 // available only when reward metric is NOT coupon
}