{
  "manageEntity": {
    "action": "Save",
    "entityId": "954398007",
    "entityType": "Track",
    "nonce": "0xd7066bbbf2292993e531dc8f554bf33a066edea4f59735c46e7d538bc5be1f10",
    "signature": "0x4f6ce55ecaee54301a069145953d52edce9eac8e91badd09f13234c5a48d28d91c2182e854aff96e668dd43f9a3811d2a0ba3ff37fd464aa44b69b8d74e8a4641c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}