{
  "manageEntity": {
    "action": "Save",
    "entityId": "987242",
    "entityType": "Track",
    "nonce": "0x691c4f9e439f68df4c811809446f6586b0fc3440fb83d707bcc058baadeb7672",
    "signature": "0x6ec9f3f32801f665569d6f23a412f17832489313dae57a667743e7335a809a283c2bd3f1f5b8cded961398e43887a6c6476c708c68009c237cb3d0e799aab1921c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}