{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0d91c030db0a4629a11b113b51c919518522ca47c3654966c7ad2ec84f05d870",
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    "signer": "0x6fa14040992e5065F911f7468f1A5C143ac5fD5D",
    "userId": "6102114"
  }
}