{
  "manageEntity": {
    "action": "Save",
    "entityId": "50386377",
    "entityType": "Track",
    "nonce": "0x6d4d9c1c9dbcee2d6b35f03c0172e06faa5525a1486897bac30e18068ea48220",
    "signature": "0x2fc20edcaa7fb1511da8c056529f32288e971e199cc72f627aad5990eeb1fddb7d6c7b4e15af0f48330bade0a8d6b9a0fd7e4cd4c76523ba4f125c813d07d8ab1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}