{
  "manageEntity": {
    "action": "Save",
    "entityId": "1356231364",
    "entityType": "Track",
    "nonce": "0x3c5e9a4c9907ebfbef9dc7e255dde680e79bfe3cc0451bc48ee8f8df1f2964b8",
    "signature": "0xcb322dc6351536a929fb6e5c846dde6bc3b080e74e7f592be70c127e55627b094e3a0f6e4f2bc2df1d183906ec54fb20add62b6f8c0ee3a8e80603d35d9144a51c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}