{
  "manageEntity": {
    "action": "Save",
    "entityId": "675758706",
    "entityType": "Track",
    "nonce": "0x6589add2c60f4110062206ef70ca720bea492c8b36a6e3a308513c265990c190",
    "signature": "0xefc59da017109c03f376455d19f55e06f8fa8f4af73ba59fa97cc20e54c24de52925aaec33a9b152c7aecd574a7b9c16caa940367fb6b2545ba7ba08e86aef981c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}