{
  "manageEntity": {
    "action": "Save",
    "entityId": "472884",
    "entityType": "Track",
    "nonce": "0x9add114e8ac71184900cb15f1d4df770d0f9cbf2e47bba8042c125fe6b2eed4d",
    "signature": "0x99669718f61071d0212b293e0378a04fe7d52107af227b05bede7af482c0af0e28b6b2d572beb4128b218b382b8f012e5fdc6e6751808137d90aea4b0cd834491c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}