{
  "manageEntity": {
    "action": "Save",
    "entityId": "1149074396",
    "entityType": "Track",
    "nonce": "0xef9f4c22094baf652bb619f9485b94371b08a8b33b07b749d0d5143cf6edd685",
    "signature": "0x87c9db277bf4adc47668a9e9025dd7f47f4536479793c3c06c960e1887d7811b33f24c853136ddb48e057f0840abb6902e87c2e2024f8605746f8d4b3d613bc61b",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}