{
  "manageEntity": {
    "action": "Save",
    "entityId": "924577439",
    "entityType": "Track",
    "nonce": "0xb927d6bccfe7908bfc1a733e838f45aa98026f5e1b3fe29fd026c29bff422c24",
    "signature": "0x95b6fce6d2d51effb5eb4744d3955679393e7971c9db53c7488e68cb17525a3f664191144c173af37397056077233965854d0811ecf889ec5a6b8ba0ee97f2711b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}