curl https://api.thanxsandbox.com/users/woerihfslkwer/communication_settings?merchant_id=owierywtwt \
  -X PATCH \
  -H 'X-ClientId: {client_id}' \
  -H 'Accept-Version: v4.0' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer {access_token}' \
  -d '{
    "communication_setting": {
      "reward_progress": {
        "email": false
      },
      "reward_offer": {
        "notification": false,
        "email": false
      },
      "marketing_general": {
        "email": false
      }
    }
  }'

{
  "communication_setting": {
    "id": "weoruoisdhf",
    "merchant_id": "owierywtwt",
    "merchant_handle": "example-merchant",
    "user_id": "woerushfwe",
    "reward_progress": {
      "email": true
    },
    "reward_offer": {
      "notification": true,
      "email": true
    },
    "marketing_general": {
      "email": true
    }
  }
}