{
  "manageEntity": {
    "action": "Save",
    "entityId": "2030836708",
    "entityType": "Track",
    "nonce": "0x75613c02204de27838f37d2d581122cfe8780b0d2427197e7dc37c1b38ceda96",
    "signature": "0xe097fec30df65c05ede077c512fca0bcc013e6ee7f4cf9ce912ff05613615c0465e0d0f5f5b3cd3daef8766f8dcf1533199d8f8bbd8894422b224c7aed177c7b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}