{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd861ed0fab466d433f3d7daa00a5225312466265e5a04be21e6c8f80e2f82248",
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    "signer": "0x54bC87876799beaFF396Caf61aE3186E8235343D",
    "userId": "832575185"
  }
}