{
  "manageEntity": {
    "action": "Save",
    "entityId": "1358915247",
    "entityType": "Track",
    "nonce": "0x1dcf316ea6cd2a7661822e0b0a3f764188a2393953d156bc2353348f884e7fbc",
    "signature": "0xa7b5db224bc0a1a9b54f257e69fdc634fa463bb97db2c197deed50feec26f9d30882fc361620dd3cf5e0787452b86cb6e531b84027b2a985f9585a1bb00b228c1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}