{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9fb5e9240f66f3f8e0a087e33d45081cd5b7b77df76b83d5f88b604f3c0b1640",
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    "signer": "0xb55504f08c5963cDaD3Ebc309FE504a785bAF530",
    "userId": "562920347"
  }
}