{
  "manageEntity": {
    "action": "Save",
    "entityId": "1082529911",
    "entityType": "Track",
    "nonce": "0x287c76f6f156437f2bbf8fe7958a3674a650c7c7172975ca035e7e86af2444cc",
    "signature": "0xde9b3f70fe2f83f46c862fab61c57c6a186df61ebc594b1f05651c8dec8fcf4800051a3d7ee007690857acdb0ebdb206336cded8049ba7eb5dd41b8aaf9584bd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}