{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x181ed0f6c51f761362f9009d2359114c73c87eb594ea80d0920688b62d79a80f",
    "signature": "0xdce6241ca23458e67a3ae6263d8fbbe220fdcb8f8169410559309f0bb674f4cc2b8d253ed5fb24031c9c875d276c1551cc8ccba09160c6293a62fdf948de3a8b1c",
    "signer": "0x37db63A0ff3DDE75Df3eeC27686e2E55B3Ef03a3",
    "userId": "651857432"
  }
}