{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa536bef6bccb4617ac2eae7b880ac28005c25585356b1a642952b677857f1160",
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    "signer": "0x488C70acfD99ce455Baa5a0AC52De85516376179",
    "userId": "129704217"
  }
}