{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938435536",
    "entityType": "Track",
    "nonce": "0x9fd586a31c02f4ae2de16482e4ded63557dee4b516868f2a481440915274b52c",
    "signature": "0xe270cd2cb2980c081995113530d3d70bec7febcdad95bd3d5d76d6bb22ce57e119699b206fb15b355f013b42d67b0a47b05f3257022124d07dcd86e9b78418aa1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}