{
  "manageEntity": {
    "action": "Save",
    "entityId": "346547078",
    "entityType": "Track",
    "nonce": "0x2b80afb2b622323f7ea76d030ed2bf3e9966bb499f58994881020ced4f045a34",
    "signature": "0x68219746b6cd44b395ed7316d231cd155ba8f5cf4f8849309a048f1a4c3eed204b1729a53c7e6dfd0e898ec5a1946cac6f3dc7c9ae65f711dfb44b3a978797191c",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}