{
  "manageEntity": {
    "action": "Save",
    "entityId": "871217492",
    "entityType": "Track",
    "nonce": "0xd1a08cb615c8665d6b50aa758092716e9ab7e6c353e2c0e510fa51a73bd10d46",
    "signature": "0xb7d0043b2d7460a51664b821414c9ea49e2bdf10f6c7390bf8385ff53ea8eee82462bcd507b9852bf474a0847bcd92814ffc18592b1d2de0194a46140b882faa1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}