{
  "manageEntity": {
    "action": "Save",
    "entityId": "1654770922",
    "entityType": "Track",
    "nonce": "0x144ef5b07ff69e369afb1b4212c3e513129f2d2af6619f6d739beb014f0fc32a",
    "signature": "0x55af90134eb70aff9abe75dfff6834c9f9ee67fb39996067b052ebe8d9977c932bda4c0de22b570917a29892c9f29f643e264b6bf8c2c882e16149b07037d31c1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}