{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3cfeef301310537e3a06284727cef9f199351de650cfa641db8a033e243f6d88",
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    "signer": "0x28Ddc4C1Ba5279c4e22117Fd057a1b2C620AF75C",
    "userId": "854778562"
  }
}