{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbdc71ee306994a8b60263e5b9f654b77fbdca3efa8708690d976a4948db7cd8f",
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    "signer": "0xEDEf7E9E6922acF9288851AE61045BE30f4158A8",
    "userId": "354048659"
  }
}