{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb1732a6a197138f984c361d8a481bf0dac15067b1049b90a8b165ccc0eb85740",
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    "signer": "0xdCf33EBB5e7b84FCB16F97A7F4526df60c9fa632",
    "userId": "455914777"
  }
}