{
  "manageEntity": {
    "action": "Save",
    "entityId": "774008",
    "entityType": "Track",
    "nonce": "0x95942adfdbbf520e30b18af08c4fa224e71edd87cb7b301b64d6a9fc3f9a1bdc",
    "signature": "0xddb6f6d375b8a7342ef768e20843c0526c2ca930053c836d1d7e5649d279cd847f5780e05c438e48f959bc9bbc56c470b2db14cfcbb3c8cebe5ef48f209927971b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}