{
  "manageEntity": {
    "action": "Save",
    "entityId": "1965006494",
    "entityType": "Track",
    "nonce": "0xfaf0553981467de687212280765ad2db23170f45e1c540184e39692af8b8ae0c",
    "signature": "0xa01d2bb01f0d4ca3498724499d75b49218618548eabf899171ee95f4c6909ba2319f13da702b9e911a2b8b5a4f8eea243e98de992d9737e3b1c28ee73cf0988f1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}