{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc0bc555a2fc76a8be35ee755da7f84c9d95e8da5823bae115df6c6e7428842f0",
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    "signer": "0xD04A0ed5A059A43F54219DFa892ed814587D533e",
    "userId": "256606542"
  }
}