{
  "manageEntity": {
    "action": "Save",
    "entityId": "1794347994",
    "entityType": "Track",
    "nonce": "0x764f119fad74ba484a03c37d21ddbc49f700199ef5566610b9dfc67f0c524ac6",
    "signature": "0x3656be24c46c7023b10cfa0fd3b68966513fa95c0dc6970c31c400e0cb8bc97045c8488bb49b18bcc319293239b4a4b0d60e47a0bde9cc198b93890978225f801c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}