{
"manageEntity": {
"action": "Save",
"entityId": "1908829638",
"entityType": "Track",
"nonce": "0x3fdd23240ccb5a51f6dda6d06369126e3beee5ffc855718fca64ade4e0f031c6",
"signature": "0xd300612ba1bd484e43f0740e15fc2425889fb08217040cb963c96832ffcd2d0146c98cd14f98a05c010c453690e71cd0d6bb03965cfc5166c877ee11a42ed18e1c",
"signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
"userId": "325172820"
}
}