{
  "manageEntity": {
    "action": "Save",
    "entityId": "1661991586",
    "entityType": "Track",
    "nonce": "1792485250387534736",
    "signature": "0xf4cfd6f94a539608bb3bc4dc36ea65e19ffab75ae019ac6e63ce1b1fe9290ff15471f4ad97a9f4e24aab448ce25a7a029ea119631240ff31e35d8f7a6ebc7e531c",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}