{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3ba12b5157e58a4c0e4c621f100ba013b9bc01746b05b67232024b8dc7b29a3f",
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    "signer": "0xbF01d3816a6F4764Da6dF0CeFC8C48EEFdABB333",
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}