{
  "manageEntity": {
    "action": "Save",
    "entityId": "1655620621",
    "entityType": "Track",
    "nonce": "0xd57422cb7a7de28caa2a7a8a98e65249d01509d92da00dcacbb9f8e0646a6cad",
    "signature": "0x4dd27a8d8517d1745a43a32743e41e745133195b9bf8712862b0afe602be8b804d5b61e16d2fa207b5e16311fa84b8cf6dbbff97c406e07134527625c531781e1b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}