{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5914290e0a0ed13557c3742129323aea023c7c205d0c90ca8e4834bb61165366",
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    "signer": "0xFa2d4C2518C0BB689b437d226912F37Cd9d98A23",
    "userId": "61154"
  }
}