{
  "manageEntity": {
    "action": "Save",
    "entityId": "857518086",
    "entityType": "Track",
    "nonce": "0xfff376f3c1b5022d21adf680ac498031daefcdf26aba61afbec405e5fc9a5865",
    "signature": "0xb0169ff0e1a22e9aec4dcb53c064aa727071e7702ecec8a3d3aea9c4c4cd19195f6e3d3e64bce60c93d1fb2af1ba38b30448bc9ac5950c40ccdd75220868470d1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}