{
  "manageEntity": {
    "action": "Save",
    "entityId": "261732759",
    "entityType": "Track",
    "nonce": "0x29f2e9e60278ed543e44196bea2dd78f15aa349aee06bf19c3a7ec96c3103913",
    "signature": "0x45866030de3ce9416156793426af399381e5b42eb242b17c243ff233849190b82de41f8ae7e3afe723a56f1adbe70dc8af2e97ba4081189758dcb5e22f40df7a1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}