{
  "manageEntity": {
    "action": "Save",
    "entityId": "460376",
    "entityType": "Track",
    "nonce": "0x491b970ee2ef42a06313aa49829e1e98ab1c969cec97d904d49fcb402d28eb12",
    "signature": "0x431e6e004d5c46cadea262a15a61ba52163619c4eebaeaf65bad5def8816c47e64b8e30376088d01fc8b159691bd687af1aad58aedae222cd49d0adf651120bb1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}