{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004028574",
    "entityType": "Track",
    "nonce": "0x2d1d13732be8892efacef3c9081163bf06198fa325564111a6b88d1e2d112d4a",
    "signature": "0x3b66d2d84315e5ee6d52315259a38a3d1b7c2f55cd2cb065ddd65e5c4c41517502f960c8636a73c3529b5f6e6b924c137aae47cf1a048e76bff32f6c26473aff1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}