{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x38d68976eb66597a4d5b94f60655ba490031e808542f6e664a8c6ee7343f137f",
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    "signer": "0x3F0e5297469e3774504A0e750F1885b06DFb9b30",
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}