{
  "manageEntity": {
    "action": "Save",
    "entityId": "1192901000",
    "entityType": "Track",
    "nonce": "0x8054f651042be59558f851d31abfab27b3726e148c92b03c63fff3ea704ce04b",
    "signature": "0x43be185e47f1959cbd6c2ec3a2b2263e562dcb2409099d5093e3d15ec4826ef81ba1f8f1a0fd4e3339eb67e0edf0a32b271a1e4febc0df1fe7fbd0ec8e055f511b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}