{
  "manageEntity": {
    "action": "Save",
    "entityId": "15072",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9678b4b975974e3cf81ce63bd76549c7ae74b77ef2b087f16ab04ff8b844e1ec",
    "signature": "0x3da85261f7d702d490d38a8155f014f6fc6a88f039714fea425c5a101c5e8a8f42bd7c54d81efee090ed78ebfe32daad780cbea416d5370d218f87c8bbcb3dc41c",
    "signer": "0x3Dd98e6746E2F92C0a4E1a87076f07F2F0d58736",
    "userId": "474827746"
  }
}