{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd21b50ea08ba6be030b4b643b4d164a8c3f79a180a49e90db658c62e148fb216",
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    "signer": "0x149CC6a9cAa0251Ca543017dBB916C90B016ed03",
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}