{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x55ee226f3ffc071dde53be51e2557c65eea3e386b57e70207305511add6f6d44",
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    "signer": "0x4D2D17E9078a257050f14FdD4730a37e4Ee3C62B",
    "userId": "848751401"
  }
}