{
  "manageEntity": {
    "action": "Save",
    "entityId": "1544563804",
    "entityType": "Track",
    "nonce": "0xbc6a15ee2a32d04be6262f49abd1451baf339799c23be0cdb27875105d2ced42",
    "signature": "0xc4d3878558045c4a671443d97ec234ba9a1d5b340a43548f5cc8e2c1d43b04bd206e2c46d748ecb0c150634861de025fcc9b9fe4c04aeb723f2d669006fae63b1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}