{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd27460daf30bd3ee58e8dd130cfc0eb56280b3dab5e558e4f4cb92f03bd5fc57",
    "signature": "0x0c61c80ab9030cf0688321ae884e5377597e0ff09fca2c557007ef6c88be1c6e00da5876da6d7df2fd52ac76c39a85a97e11f8e6de400e4af8fdf3cc72ec6d5b1c",
    "signer": "0x1A03dB80e576Ab52a1E1852ba81778ae8f8f3f95",
    "userId": "876735576"
  }
}