{
  "manageEntity": {
    "action": "Save",
    "entityId": "1454701852",
    "entityType": "Track",
    "nonce": "0x5472b7b8c71c9b1bf89d2448fa4eba06872d590735945607cc7400ca958048ed",
    "signature": "0x13f3e41985e824a9f44ca08d508c6141c406f0e1cf07af8659b3cfde5d6fe8253b9524b7a9ecf1670fa1615541e4064361b03feccc20cf8c783cc55781abe70b1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}