{
  "manageEntity": {
    "action": "Save",
    "entityId": "481065071",
    "entityType": "Track",
    "nonce": "0xcc50113274e5556352e35753bb6d032443bcc7c9f4b31dde2bb15ee35b474c9d",
    "signature": "0x54770f9b2fe6accd320c6640c7ade093a035048a5eaaf4ea042cc73bc89d10b71df0e2803692cf3cbf4275fcc543bacc2c0a19ab4c58790ce49063680b412efb1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}