{
  "manageEntity": {
    "action": "Save",
    "entityId": "1938492456",
    "entityType": "Track",
    "nonce": "0x45f6d861610e41b0b59a4a9aa41e5bc5d1a5c9ff1d76afbabd480d7aa602bc47",
    "signature": "0xe78934361c12e0da927d5208a5b28285b58815d7e0ff88d4d7f03162d0149fd91994ad21090153c46e3e2db607e183f82d994842a304f4f78038c7e48521e8131b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}