{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9b84ddb986be340c185c9032f751d8ee42b82facbbee397da401d260642cf5b3",
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    "signer": "0x3cD819677715E5bEcDcEF763756294f39C3C044E",
    "userId": "561576876"
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}