{
"manageEntity": {
"action": "Save",
"entityId": "1661417936",
"entityType": "Track",
"nonce": "0xeb65ec59c973d2d9e88b1c43c9735cea7dc9fee1bf7e6641c55fb88fbac8e0fe",
"signature": "0x397393e0ffbf702bb24f8fb1f1e917929ad600d853ecddf65f3217f0f58dd57560ed6470be1ec2779bab21a36c6458989bca9b055a5e614e3cec6a50faf5991c1c",
"signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
"userId": "850416615"
}
}