{
  "manageEntity": {
    "action": "Save",
    "entityId": "571704",
    "entityType": "Track",
    "nonce": "0x8b592bd65647baf7e4feacee3b28100bc666d55afeb91476b409cbc1d089a706",
    "signature": "0xf42c0834a923186d88b90265c1ccc9d99f89dc3b221e17a49fdcd00c3add60b615d1ddca59d2a4fe27020181d7646910384dafbf0c1989211c9b6bb01ac629be1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}