{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xff41561007364c6ba6cf65958e421c94558d572233f0ef6fc4114c9a5c1b7a88",
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    "signer": "0xbAddc7a59cC8A05c8c6b0Dc8B3621B082f8C98bd",
    "userId": "562834680"
  }
}