{
  "manageEntity": {
    "action": "Save",
    "entityId": "624066",
    "entityType": "Track",
    "nonce": "0xbbef2f80119800542010d2ee643e44f41b9fad85cfb50418b220cb5da79bfc49",
    "signature": "0xa85c0d590d21eee43549acafe6d904e398b79dd160b9790570330abc34f7e0a671213f80f3c395d014ff460fe8d9572cb8fa3b1332cfe9324c90ff5d8b34ae3d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}