{
  "manageEntity": {
    "action": "Save",
    "entityId": "51325",
    "entityType": "Track",
    "nonce": "0x4cd852637ca934e47e5da5d51bc57f1a8e01548a28543fa509353fba1e71d2c7",
    "signature": "0xdc203b9a93b28abf2b75c62da0b40937480d41c6fca159d59009daf49e4dbe16453c8e1cc428acf865b4f860131564b41c1412a0183295dd031856b516477d181c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}