{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3fb4fae59d26ae1c50580db415eb93025d6159ef3ce8ccca481c54f4967a709d",
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    "signer": "0x79411A4599f8FdE364c4FB08bfEC7d9d285B709b",
    "userId": "921634047"
  }
}