{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa7f303af801a402be958fc7887bed4cccb0e3d9b5cd0a349022ff4cb6d9fa565",
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    "signer": "0xFb410b7eB2293C024d555A6140342B981b76722d",
    "userId": "708890665"
  }
}