{
  "manageEntity": {
    "action": "Save",
    "entityId": "949985312",
    "entityType": "Track",
    "nonce": "0xe7fdc16cc8827cd37ce227869dcc61e9c96541b3ae9bff2773f46a9e311de482",
    "signature": "0x6d11f5e6ad5d33a7a1d6d650516a80c8cbbb38f78aadde8f16e53eae05b6f7b202711e3b66b3badd922ceb1ce296d7ce7b37c9e09cbd315228b5884fa8e3acfc1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}