AssignCouponRequest

{
    "coupon_set_id": 0,
    "member_uuid": "89721e5f-9a62-45a4-a5e0-7ef0a7b5ad0a",
    "quantity": 1,
    "expire_date": "2019-08-24T14:15:22.123Z",
    "expire_after_days": 1
}