{
  "manageEntity": {
    "action": "Save",
    "entityId": "1344753882",
    "entityType": "Track",
    "nonce": "0x3003428c80a325813758ed4e7d599971c4edbd5bb8d07c26849223e770118bd7",
    "signature": "0xd575c10a4b3901f5ce4d9c2a8f02a2dcc99bda7453e4cd24823597dfad3cfb694ca3535fd5f1b19eadf00959168c4eee4573fd7eaa218546ff7ac85b3ae31e6a1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}