{
  "manageEntity": {
    "action": "Save",
    "entityId": "2118667791",
    "entityType": "Track",
    "nonce": "0xef3e35d38967f90012e2fd6097fbe494748dcf21e0d4a33372635ae4cb5dd2be",
    "signature": "0xad9a58e93000db2e749b8d24281b8bf0a14026ebfb3e8406f7aea14323a9522f09b9f5cc676bcb9f7dfdb160e410b46de4724f93873a2b7551e60da6549ec6381c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}