{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x521b89ad78c6af17b05b3012bad81c6bb4f2b0cf79bf0e4dd67ace40ec5473f1",
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    "signer": "0xD2F2E85916598FFb221B3d399A164cD39bd24DD7",
    "userId": "132339661"
  }
}