{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4412f2a514ce5f66c46e87a3f9749abf27d44923300127e73ad83fcf0986ad81",
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    "signer": "0x3d33d58e75700434a9FFe3363A3138A768468B6a",
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  }
}