{
  "manageEntity": {
    "action": "Save",
    "entityId": "520166966",
    "entityType": "Track",
    "nonce": "0x9036c143d663d0d5e32cd5d836051726022aa20be57fc4889f13d2c4f673e09c",
    "signature": "0xd74174cdeaf4bd5b258a642447c2040e7d13816bcbee7f9a6ba3409b2a5a41737de779ef1d2233132d2b8230cdae4420640284473cfe4daa08bf5d6c95c38f951b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}