{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408867952",
    "entityType": "Track",
    "nonce": "0x0805f869d547454f0946e0406ed7f3acaea84a697c923b71bff5338dd75de715",
    "signature": "0xf7a2b307f08dbe850df22cd915cde83286fe478ecf302c97d090993a4997d46f0920b875617dcb24aa3f6df1a0c439ae00465fa338533151778e4146de5a88f01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}