{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817383460",
    "entityType": "Track",
    "nonce": "1792323475422594900",
    "signature": "0x464f6376f11606ad60c2453acffe72678c3d889afe7c938f43cdca20600e3a6b122db427f10f8228d875c89029e589344c8c5e3b61cbf5772a21e63b6097de4b1c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}