{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3b11a0c82bf88c9a98d027bb156ea81930b72f9d33a4719603524ca40695843f",
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    "signer": "0xEbCEd30A645852EFbdcc18e37b6158993Ef712c7",
    "userId": "865282635"
  }
}