{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x67f3bcc1d2b6ce2a50fb39c7103a10ee4c10a173a632de3a63a61289ed38c846",
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    "signer": "0xcdC40AFF6A3606D0ec8e4Df721d01C8F35F9CC2D",
    "userId": "880959822"
  }
}