{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8e7447cf748832ad7b5e158afc2d45168c96f5377d2593bbe75247f6d1d306fe",
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    "signer": "0x19B1902e8315D7428495E3F505be756A14C14382",
    "userId": "963175434"
  }
}