{
  "manageEntity": {
    "action": "Save",
    "entityId": "190608",
    "entityType": "Track",
    "nonce": "0x2613268e8ff8428d883de68cf57485cbd70939bf45dc47a2a656c30208582f48",
    "signature": "0x55c96d0e31501b4b83bb22ce37803b68ad32b288913126ab6238eb3a76bd7e7e2d68e4349b11c26f8a7458466fd9cc9832d28c7953613998ad0bb078fdda1b511c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}