{
  "manageEntity": {
    "action": "Save",
    "entityId": "765770461",
    "entityType": "Track",
    "nonce": "0x1bd0c113d11574743da429e7973bc851e4cfb9bbb3b1c2aef086f78d2ef0fc18",
    "signature": "0x088be130cb515553ba2d6d60aae0ced72141a35254f3563967deb316e4bddeba5cec44d32b9a01ed5d2717105969edaa93df189de4fbf94fb096ba15d3f75eee1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}