{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x62848ab250b639bbd4498cd9453519bd7477374a171e55d9b3a40c05e858dd0d",
    "signature": "0xf196ff600441187ad7dfde043a0a5ef7d60ebadd36da4a019e9bd0b472a592a000aff0125d7afc633854d9d5c41c8a853cfa8c657d02ed043c58e1088af42e061b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}