{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x238a6ea8759d9fd8a7dbfbe5adad69ffe44c8058bd346217f250fc873a1e662c",
    "signature": "0xf7a9791e215c2cbff83fa774f2aa78083664ea3fdf3359ae7b9278e4be577bc92992335094210ed23183ba409e14d21e3ca5ed402be6fc7ebe615ea983e3e4df1b",
    "signer": "0x91ce22675b3Ae41635012FEC52f51e795276251a",
    "userId": "908674709"
  }
}