{
"manageEntity": {
"action": "Save",
"entityId": "555890",
"entityType": "Track",
"nonce": "0x542809be87527d2733153eabf89f09eb856a4739d17b08b7e9700071b1fdc9db",
"signature": "0x0328d0228d6f9b5f0db21e39a60dd817a6d3f3dd9d8f1d3fb2c2b799a03c2c202ba5684dd773ddfa74c46a3e43894539153db37d0319912ccc5e08e3e247ba9c1b",
"signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
"userId": "983568397"
}
}