Overall Channel level

curl --request PATCH \
  --url https://hub.suprsend.com/v1/user/{distinct_id}/preference/channel_preference/ \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "channel_preferences": [
    {
      "channel": "email",
      "is_restricted": false
    }
  ]
}'

{
  "channel_preferences": [
    {
      "channel": "email",
      "is_restricted": true
    },
    {
      "channel": "inbox",
      "is_restricted": false
    }
  ]
}