{
  "manageEntity": {
    "action": "Save",
    "entityId": "1602068173",
    "entityType": "Track",
    "nonce": "0x8a281c0ae10233f0c5c95acb8d4f5b4435bcff91bd0abdc9d7ca91119bdc6bc2",
    "signature": "0xf5bc64e99c0e59fcaa74914f088131cfa0cdab6d583d9731b93fe4c6c8ae17766fef8f3b9151b1cbea549c59afcb8caa9085e4c8c3955dea9c967fb9478f52af1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}