{
  "manageEntity": {
    "action": "Save",
    "entityId": "763761598",
    "entityType": "Track",
    "nonce": "0xdb313b074c9308f911b7b2372bae6e027ab0c1e4029b84c60338843af45d4303",
    "signature": "0x3ad3dc007646fa79fb098d58818c137c6e4ebe90046d34e89f59e82b3a48f8e047012375b3df28a6c754d6e06c4c5c2a891afa557ee78e913baf56c27cafa6811c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}