{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdadc921abff542fbf944dc69d6d972eb732dd82c085f7f84e1c657ef53f942b8",
    "signature": "0x7bdeee85323585f93c02c5752f96e578c3e83b6d2e31b5aa3b0d7e9985905aa530257e108a00b6f67f61cb46fbca8c42bab2e5a6d54253d06c41cfcb002425a91c",
    "signer": "0x8037888eE4fC17099Be63ecF4629e72649D03A1d",
    "userId": "466079482"
  }
}