{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbcd93b31a4c42e33d924d8b881c138bf373f24ce287e6a15752dc45af0a39e03",
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    "signer": "0xb7FB61127f6E78ab910D1330Dd706ae21eBa28A3",
    "userId": "509785341"
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}