{
  "manageEntity": {
    "action": "Save",
    "entityId": "266788857",
    "entityType": "Track",
    "nonce": "0xc0668ff2734c4698ed8b654e4291ce92652dd85758f46ffd90f489e7488c212b",
    "signature": "0x5aa74f85d2b8ffe5af57d1f5b052c5e41029fe755fe0301331161ba297d8c6602f6c1779db2656cc29617327b65d434a17d4f04f720905a7f91da5158980817f1c",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}