{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x52360b489bfe247791ac70bb9e3611c7e5d4d5d191aaea70b025a091b132503b",
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    "signer": "0x3B5fb0Df5acd4711A948e28CA2d44A7f8D7d8C0D",
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  }
}