{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x898cbb13d3676643c64cb75b38d87f613101314925288bb5b0e75aec9b5a0144",
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    "signer": "0x502e221791BBAb2Cb01c3ce8a22B9500AFd3E93F",
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}