{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247758634",
    "entityType": "Track",
    "nonce": "0x6416c2c8f85caf08f57bc709dddef43add861beb3ef892c4a47dbfdf546cee6c",
    "signature": "0xcde292d81f0c3be3692c226bb8b2941094641692c24a2e1b8cf1135ca0010700549506fb260ed1c4094212e25883298fc3bd0d19709e1f56b92495ab036311b01c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}