{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0b909e3be2503e1439845c97f7eb35a3503f955197f339dd7885d407c824dede",
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    "signer": "0x8e6A86c6783FE9401aC51E281FdF8Ba2E722d0b5",
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}