{
  "manageEntity": {
    "action": "Save",
    "entityId": "55252337",
    "entityType": "Track",
    "nonce": "0x55ea18b9970434edf1be05136de873d17f93f9637f9103b3954b1d3f2889e86f",
    "signature": "0x940e5c75999ec665001802ba0fa1ef2853a2ae418e4eed178c7750d73b11d1fb0694f4dbc1cb136be285903c6ce32f06fa882fdfd4f1f888794ef7e0f64b24a61b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}