{
  "manageEntity": {
    "action": "Save",
    "entityId": "1513281212",
    "entityType": "Track",
    "nonce": "0xdd675ac9b163af45f39a65919d02ed048f5989b1b96ec37989e93d4810fdca12",
    "signature": "0x6167808f734317e2b60a6b5842adf619ff0c477688770e15b0114af658c04eac5d754ae06e35c86b479c38ead8d78a8133ec6227ba7d37a533bac460813df6291b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}