{
  "manageEntity": {
    "action": "Save",
    "entityId": "665737350",
    "entityType": "Track",
    "nonce": "1792321194717013469",
    "signature": "0xd7bb45331a980e0694c64f77d876a3af19ee56b969d9e3d4c90d63a506bf2ad94e9765d5a7ab1745d124e8c4327da46b59803f0ab79f0101744a378b5ec966c91c",
    "signer": "0x1007e09532BE90331E035838A9E2E0700bB9741a",
    "userId": "329513359"
  }
}