{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249823962",
    "entityType": "Track",
    "nonce": "1790045696394071297",
    "signature": "0x0a5f5bd809df0af8a640ec4f8482199d259371e9522102b006fc18c8e0f6adf1120d44723c33628afbf4626ce4413681df2dce132eda96ae3a790d41bffeb7461c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}