{
  "manageEntity": {
    "action": "Save",
    "entityId": "998392172",
    "entityType": "Track",
    "nonce": "0x4f4c114ae0770c03d8578480f94d8271f3c3137619089c005e9fd4597d4760de",
    "signature": "0xb083df6682f0f97b9c2c7ff80582a6ce26c3050f6f050b8f9971ca9e39b708187a26f921ef27a82c1ef36c7d6084171a81983447821c27260bda6da9a9b232461b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}