{
  "manageEntity": {
    "action": "Save",
    "entityId": "591410077",
    "entityType": "Track",
    "nonce": "0x29825e652b4aab6c91d9574e9e589b28a1da08f434ad3504751ea53df71de757",
    "signature": "0x7b955c8a67ae716f1a2468fc9fe3df845474888b97d277cf86ed2e1ad3cb98d64a6beb91309a3515f544b0ad4e8ef16e878e3083882a4ff5966cbc82931196411c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}