{
  "manageEntity": {
    "action": "Save",
    "entityId": "384276958",
    "entityType": "Track",
    "nonce": "0x30db9f921404cda5c21e2d9ee5000833208e084e22e04e6a01e743e0bc69cc04",
    "signature": "0x65e763f59235c8b3b01d13d094e5955f24c24ce984c6e5af80ca1df0140dd9db5c51284c65b383eb4c524022fa288111b8ac897744d60510429c07f0c5de67551b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}