{
  "manageEntity": {
    "action": "Save",
    "entityId": "776080010",
    "entityType": "Track",
    "nonce": "0xe2c9301e70d1cceafb3d77845e2aa96aec054606e42410ea21aee33a49409cb1",
    "signature": "0x0fb91b5bd26604fe6694479e050ace551b2edf1cfe8a39bfa4a9ee4d43a6b8ab5a9689e64b7c31e5456208c78e3300127943c770f6529abe648c013b2003bbd91c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}