{
  "manageEntity": {
    "action": "Save",
    "entityId": "1017458292",
    "entityType": "Track",
    "nonce": "0x22043a3e7c94b25f8be95a31ad0950f6c5fb8ab5cb6c5faa89b96653c035befa",
    "signature": "0x52a97c6176e95caf9a737552d416cea7287ecc4c90f4a957b148af67cbfb159b1a3001b13abd344c9a24afad0f1cc45eba16f85dce3583e62b0f7389a2f6024f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}