{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745055267",
    "entityType": "Track",
    "nonce": "0x6801e4554e2409d943f7e5d2682e7627c31a54afdc51e5b1519db1b1160017e9",
    "signature": "0x07746ccf99b75b5afb1f3e27f01d75ac2cf6c53ff1d8fb8949df402c924208505852a9d5471ba53fd6b45028d8e2d7e39e432fd981feb01c472436af0d8fde9d1b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}