{
  "manageEntity": {
    "action": "Save",
    "entityId": "1806691973",
    "entityType": "Track",
    "nonce": "0x2440e245b4bff8ef9356c334e866e660d2b1e6bac79be0072f3a806221119393",
    "signature": "0x4ac3aa5221f341b211e40eea6a96b485aff6b6e84ce298cbad298b24440c441a401d6e8449a429c65de717d33b224cb042cccd8e2a4a2f2f8acdd73d6c7576aa1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}