{
  "manageEntity": {
    "action": "Save",
    "entityId": "786635146",
    "entityType": "Track",
    "nonce": "0x7867a751e195898fef2d051c9c6890ad691b28b2d0dc954d80bee2c484c7be2a",
    "signature": "0xc7e270084a0bb4c6f188b548fa067dba671b298cd877944aaeaff7e9ecfea32f670f1041d416d348da31dbcfc1e2b81d07e9db8fc1fa864fa352f881f4ded36f1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}