{
  "manageEntity": {
    "action": "Save",
    "entityId": "144737061",
    "entityType": "Track",
    "nonce": "0xd41e11ca975e1339064a5a5fd63e951de175b95f0d0ace635acd459ed3ad54f6",
    "signature": "0x9cd63c2049b33ffafd4834d2b79cb587502f4493228f5e06d653b7320ef9ca3633ea49b4609984d2fa0596a146de6358cf568a8c1a7ce04f07b5db038db61cd81b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}