{
"manageEntity": {
"action": "Save",
"entityId": "271953410",
"entityType": "Track",
"nonce": "0x4beeaa3a6a5a496f9ee06b0a0a400801fff1e6eda124e050e7f934697a82bee7",
"signature": "0x3a6c714dcd9b0a3f0b037ab7f4ce1af0d6b524de796b0cc58bbb867afb13f2a848186b2cacb5e45ab826e5fd557f34d117da5b13c8e6142ca8a6bed00d285f8c1b",
"signer": "0xDd320Ea9a099A13D44fB85307EafaF14e61fe55F",
"userId": "820149711"
}
}