{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3cca8e744947ca78f0d60d045480d162e0e22882a062cc3da0e0f4a122d1347b",
    "signature": "0x80f13cb7d15b249e5b5c8bcd1359ab9e0329ab2dd34a72bd33f8b456b61a7d533a9bb93845a519a336169997ff63872b83f99a6f30550cf32f27ba82da65ae7e1c",
    "signer": "0xA4b388bc5548c14c32D5c111cAc7f69Cf14fa35C",
    "userId": "258980111"
  }
}