{
  "manageEntity": {
    "action": "Save",
    "entityId": "898253746",
    "entityType": "Track",
    "nonce": "0x356a4d04f3a1bcf275d6a46cc6f3d2874448fb20a2587c2d814869382a0d8351",
    "signature": "0x8b8a2fae1b014caff737d182a63a1b62d035c816c256f6c46e1ad82f7299fc3f4c02291539007c8d7229f3bb7475d28146cb752a6cd7f67c4b27ce652bd90ba71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}