{
  "manageEntity": {
    "action": "Save",
    "entityId": "253415552",
    "entityType": "Track",
    "nonce": "0x7d2ea112a16e94faeda856c79612c114a7f24599bccc83b3126e77397c7782da",
    "signature": "0x318abdb875df576d9f31fca918d83f9de368f9a80f049b76c4740f8d3b3c119b2ff87e8900aba2ea5a6f9d0f93e2af856786f08488df15b2f55e82dae065f4101b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}