{
  "manageEntity": {
    "action": "Save",
    "entityId": "1506096475",
    "entityType": "Track",
    "nonce": "0x0340fb72d80e3ec45a866c35b711dc40473b0372bf46051716234ff47e9b4cf6",
    "signature": "0x6b2753acc6ad400114b2ade96f194dfa8f6f3c8b709444da750430e0ca3c165b714086575620bbf5d685248a8ce151a4dcad5b024921bf5fd43573c659b157611c",
    "signer": "0xAaC77705f5f6bd787D8581c36Ddaf7c0c7AE3370",
    "userId": "827420993"
  }
}