{
  "manageEntity": {
    "action": "Save",
    "entityId": "2058528074",
    "entityType": "Track",
    "nonce": "0x688f416796d09ef6f1f7c6b164dea1c53ae049c907508d018cc432feb23a1214",
    "signature": "0x944308e953c24f81cc8bc191c16a2edec3b9e74b6f469faa3a6b39319d5ce8af703655ac4cb32e4d3d731134f47149252274b6f94716e5e58536d70b151d78211b",
    "signer": "0xb51B50C9b7d88C66d31539161F4BA9Dd72a17dF5",
    "userId": "465531556"
  }
}