{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7ada7e5040d1e07bc8d225b62f9d1c3262ff79b8638231eed0dc17ea55646a77",
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    "signer": "0xAE2C51897C4bac0CF77bf478C3B6f1D8E74C8202",
    "userId": "673165756"
  }
}