{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940915920",
    "entityType": "Track",
    "nonce": "0xb5b27c86b629ba9759542d2a5dd94c1e7b7a93c0a2dcc2593f76b3ca5855677e",
    "signature": "0x9b74efab7133ded15f1836049bf88c8b64e23ac99b7da74b1c2948d7962141dc5b85c731bde6f643757823e7ac1174cf39ebc38755cc809deb8cd778a94ccead1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}