{
  "manageEntity": {
    "action": "Save",
    "entityId": "396570995",
    "entityType": "Track",
    "nonce": "0xd6287d37ffeec44f9fc0beea607a956c55792a5b005efa1f565abeb11b6e6b21",
    "signature": "0x5b6fe4aa5495da252debb9e9e023331108fed5f835593efe67f8c27903a212db41ca5e09a93c0efede39a83c891b92fae2089e53388aa3cd410b7f126c40d39e1b",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}