{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdce8c7c8f30e8b80df08ca80bb4834ca2324971139b2d310be80cb30a77f5c91",
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    "signer": "0x252D5DC4748Db077bc60944947dB2Bb8485B9b05",
    "userId": "902222482"
  }
}