{
  "manageEntity": {
    "action": "Save",
    "entityId": "1892043313",
    "entityType": "Track",
    "nonce": "0xb7b8e5c3a3901b18ec3484b3d787fa4e0c0f03468b239d8bb06b11a834ec4e54",
    "signature": "0x00d2ef71b94e34d81abbb49c88f8c253e5e2b023a544c32676961f3d7c1846fd10e5663582fd1a1a2783b14841ad8c137d156db28d813fa2c32a1bae5385871b1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}