{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeaf2cd433d92ea9491125b15d7210a25fed7f3aa1fcc6840bd5ff2c3eb29aa07",
    "signature": "0x1e67ceae008ab7bd83f490e344b0700f15ae728cfa47b4ca0ff0d7017578c56d289f6cb5d918b371ee4fb86b7ddd4356286986059bc0a88fb02e9e49c108f22c1c",
    "signer": "0xFa2d4C2518C0BB689b437d226912F37Cd9d98A23",
    "userId": "61154"
  }
}