{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6a690ea7f8f3606e178e8ac3557ed2e64ef38d885486de21f8363c1554b806a5",
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    "signer": "0xCf935912401212345CAf723421Edcab4F675a495",
    "userId": "915454181"
  }
}