{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa0fd5feb5bfdfe1eba9197e2f9c187ab520960ad3f75f82060ff2ee632b722d2",
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    "signer": "0x54bed9FCc45710BaB526AaA37Be6d7E22e31d2e8",
    "userId": "555228176"
  }
}