{
  "manageEntity": {
    "action": "Save",
    "entityId": "543882",
    "entityType": "Track",
    "nonce": "0x00649eb8bcbea69d0a00bda09382477f28012b06c65cb4f10d6d310fbced84ee",
    "signature": "0x56382fb93aa68f9e7dbd8d1f53150e5262db09a627019156950308d6ff399b0415a0a80c303d5407a3060d2af8326637f3c1eace6ccc0712d76adb74e259ae391c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}