{
  "manageEntity": {
    "action": "Save",
    "entityId": "1184055688",
    "entityType": "Track",
    "nonce": "0x4039a101dc060b04f002bdafa92455d596d54d49220cc2bce80e016f8383fc24",
    "signature": "0x5066f3a3d013c5991c4e413bb4563c9490f5f33ea7ef6ea648ee0cad19f4be6e68247c150b05f17e782dbb7da92a28ee476f25796da75b476947c709e216fc241b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}