{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x04431ed6fbf5392eb8c37b299c0090cdb14188ef53df890599be96d23d74228c",
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    "signer": "0x608aAC7ce3aF4e2fdc1E29090C81A5cf7618eDD7",
    "userId": "233845580"
  }
}