{
  "manageEntity": {
    "action": "Save",
    "entityId": "74031",
    "entityType": "Track",
    "nonce": "0xcf34d6a939a1e573bfb3e972b4d5e2d8178795210d14e88707b7d91e6056f882",
    "signature": "0x58e118d936583b434b5399da593b75ff3b590d2332fb23c1256421ffd4b70a2e18f92a350535cf52c3fe6a53062c09f49b0625f1720e051064e509535509421a1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}