{
  "manageEntity": {
    "action": "Save",
    "entityId": "588301143",
    "entityType": "Track",
    "nonce": "0x85b5bfdff994144ab6962476f4ab20557f2f700183d202070e70b8d90a3786d0",
    "signature": "0xadbf7a38f2fb160803707ec5a143111c442ef066fbc5579affc691f04c12f7a26581a36d5a4214625a9c425bec0f2b5d5224ff8667a23c6534348486eedabac81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}