{
  "manageEntity": {
    "action": "Save",
    "entityId": "740055",
    "entityType": "Track",
    "nonce": "0xfbf399e2384395fde70f4a1806d52a8ac229b2b411cc3e894655929a23fac9aa",
    "signature": "0x8ab61659fecb7ee1921c3bd369222560f02ac90557e2504a59bb5e229e6d9a1100a558642a620c21e0cf57a3cd7a8a45de2c59f9f70afdc342f4eeb203e1283b1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}