{
  "manageEntity": {
    "action": "Save",
    "entityId": "1046974",
    "entityType": "Track",
    "nonce": "0xe87f62109b35429463ddc22a17fcd64675d3b7ba308ddc9132e7ad772ee45616",
    "signature": "0x4aa59623a04916b3dde5a174a24496093cf928ee1201e760f927d5cd133fd28239ab51f56b2e4589e28e1d6ff82ea66f3f7bdddb610e4d49a8d102c7d6c5227f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}