{
  "manageEntity": {
    "action": "Save",
    "entityId": "713898141",
    "entityType": "Track",
    "nonce": "0xdb8db0f8624809c7d8887d85c35b4fa6b0856060eda03450be3c4f28b9d72257",
    "signature": "0x3f515880767a9640024a0c7af64579adc50cde7c8ea92ec09aff80547188038e1273f461c9d373f0a6725f32e3b858fceb58c9c9a41bce26ab2a4fc092ecd4a11b",
    "signer": "0x8FF85C5AA450a88f13FbD5170e24E2a3eFF32518",
    "userId": "311829956"
  }
}