{
  "manageEntity": {
    "action": "Save",
    "entityId": "827699138",
    "entityType": "Track",
    "nonce": "0xa8dbea72c6939054366139e2a169bfdadd70416e9b96eed1ef54ab8c916b6314",
    "signature": "0x55c44986529a281c104943a6f889696eba87c13da452115e7b26f8fe1e48caf36b0fb28e2c26289eefca6a5e065b8cb0e2e3229cf9653fd447d1757bfe67812f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}