{
  "manageEntity": {
    "action": "Save",
    "entityId": "1879353783",
    "entityType": "Track",
    "nonce": "0x34c6f0c51f41b788b16d588b5248320d53cff9c3abdd942cc99a8a7b4bd99725",
    "signature": "0x5bcfa880211221e080121694652b497c467270b643bd15ac7ccfb6164a0d7a972cc28d86c08724d4305557eb9310416dba32e96abe1f83694b69fb76ad1ad6071b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}