{
  "manageEntity": {
    "action": "Save",
    "entityId": "191038",
    "entityType": "Track",
    "nonce": "0x5e10539bb292e223837f2ccc993365a8a12d96e2e43c750946bbd112170f997f",
    "signature": "0x14f2de477d6a81c99ab39a37b3ac13e3123dc86fec804486588f392254c706ed362c9abcbf4b6bacd1bb05249268a59ca38127889d55a0a4df598a4a61ad51fd1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}