{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf020274611f7e2e491c34e9fd50886377b9c5bc91ae05ab6605d1fb476167afe",
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    "signer": "0xe3eBe6938038F6A1206D08516A39d7867DD26F5E",
    "userId": "967041374"
  }
}