{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x675738fb178e336d2f84d25caffcf1d8dd4705a6a1c7b23cb1d7069ed91a4266",
    "signature": "0x42633a228c7b41bed10cb5b86d9cc22637f52d29a9b9a17189d9f67d4ef8dc876a64f8b5c97a33b4237c379b3039fc762e4c2db90903df561795e998b538ae881b",
    "signer": "0x960d5922edd91F164Aa365ed5EcBB02F1F3BE0E8",
    "userId": "598622069"
  }
}