{
  "manageEntity": {
    "action": "Save",
    "entityId": "556393345",
    "entityType": "Track",
    "nonce": "0x524d78e10edc2e6edd524f389d433f55d551a100e670d9c41a02a76407b03856",
    "signature": "0xc827b2b06750a999f906dea997fc495d2dbd0a8cca388fb613e87c1fe5b64a4e282d87206a488480d6b514b866bab32dc7faddcac602692fbd4eb038883609881c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}