{
  "manageEntity": {
    "action": "Save",
    "entityId": "1044835288",
    "entityType": "Track",
    "nonce": "0xeb20c8b8dab217969637c669f144c113c89e454f5edebe67645461c493004989",
    "signature": "0x35b56d49c29eadc633394e7622412a2038dba976b2b48b522145485a88014fc04304062a257cfc3edb83ea774ac625348381b000bb9e3c156fc8fcc99ea9703b1c",
    "signer": "0xb51B50C9b7d88C66d31539161F4BA9Dd72a17dF5",
    "userId": "465531556"
  }
}