{
  "manageEntity": {
    "action": "Save",
    "entityId": "414310",
    "entityType": "Track",
    "nonce": "0x4ae43a217724936f46d7af59524a8567353067988262293ecdf16f28579f884a",
    "signature": "0x1a869bc8ab547780240161e8328e89f7eadfa731c0fb94610bd7f8dd61b928704c24df7ff1e4f0709988397aa41780e10c77d4ff55572196e94c828f85b404fc1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}