{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa1bde52f8e5245ad3c70d87303a9af0c76e54c129274afce39e7450fb8a35a0e",
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    "signer": "0xdC686913D5E6Ad58e7A1C0756B893a28b450eC55",
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}