{
  "manageEntity": {
    "action": "Save",
    "entityId": "513255298",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe18ab49567cac344f5aa44387a8a9abf5fd17a752fb20d48a664c08969babcc8",
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    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}