{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x967a2907ac7e45a3d4ad1cf73094f44973f56c61008ab39146937fe4f4fe0a1c",
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    "signer": "0xa6Ef6c60F45b6De4fceCddbF897d2a87F70802f3",
    "userId": "363745917"
  }
}