{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8653ac58cb188fa17ea070dded51d33e2b89af499daab4da41f206f8b0592f5e",
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    "signer": "0x1CEB9515aD44e3435E0A2900f1FeCC744840DffE",
    "userId": "862635897"
  }
}