{
  "manageEntity": {
    "action": "Save",
    "entityId": "1316422427",
    "entityType": "Track",
    "nonce": "0xd8d2a060211c5fef77c3c4da592e9a031900e4b863c2953dc4d9d6d36be0a42f",
    "signature": "0xac234ea51058a34f76812a8473b9a8cd72d1ebceb73dde4fa2d8177b41fd71e05a295fca860ca2d0005d878816c7710cfcd959c22557b5964fc183919528257c1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}