{
  "manageEntity": {
    "action": "Save",
    "entityId": "323915",
    "entityType": "Track",
    "nonce": "0xae3d9db5a84abc35ac13cb7911218ab3e745c92b6f9a024ff1a7a41ada5a2b22",
    "signature": "0xdd6dca26f99832277babbefc8c3259ff71f6cf8fa0f8d9e90bd54a6de762eb3865de2f85490ea4fd9bf44472f34ebcf574b7f71e304d0f6841d808efaabe3b9f1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}