{
  "manageEntity": {
    "action": "Save",
    "entityId": "996744",
    "entityType": "Track",
    "nonce": "0x9de9d87b9f53934697bdb67a109284aafc111bbbe13d6b809f004cb66c7a867a",
    "signature": "0x44c6375be5c6d9b1bbec5ee9f366656bd48ae3b3c8284d8283f60535f66878024147c75607a50d6d17f8bb9020c93b011994eab496dcc867ad8b1493fd7b387d1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}