{
  "manageEntity": {
    "action": "Save",
    "entityId": "849895862",
    "entityType": "Track",
    "nonce": "0x95742283c43321ccbfc2646649c8dcb0109f3d024251b1b84cc488e489621d99",
    "signature": "0xae98abfa3a37ccae1fbabc65857caf5acc74deed97fecce310d6e5dba3bea6e31125947dc1872ce4fc552b75fa80c5513af0daf937c1969c21195ee69fb6b1c31b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}