{
  "manageEntity": {
    "action": "Save",
    "entityId": "735782822",
    "entityType": "Track",
    "nonce": "0xb8831c886fa6cb77c5d59d4bf201eafbff468e006b8fff9858ac48acccfeee77",
    "signature": "0xd87267c1692463c852f0be6a1634da409b5edbc5aefbdbc204853ce46878d4be0b33959a40378836a8ba003a2b919f511ec27727355ad54b4c40050825b511a41b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}