{
  "manageEntity": {
    "action": "Save",
    "entityId": "597196669",
    "entityType": "Track",
    "nonce": "0x437fe1ca1beefcc5f77601403761aae48d570022cef542d4561410cbb0f3f624",
    "signature": "0x31684aad968070cd9c9ca5f8443b9365ba005e7395d4bac9ad89fa6975d209a3466ba1e9d2f1aa4f9f1dd13c319fc65b5a1181c71c1ebbf2e2f5e42fcca532db1c",
    "signer": "0x9436FA87F6c8C3aa9e0F0fc7960566dEeB9e23d4",
    "userId": "220347726"
  }
}