{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa20a0c6713f13a91d28f827545c7a7395209fbe8d6f9806bc5707715706aa50f",
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    "signer": "0x1aff868941743406552B545761a8C72ecF616F24",
    "userId": "476619763"
  }
}