{
  "manageEntity": {
    "action": "Save",
    "entityId": "1120432223",
    "entityType": "Track",
    "nonce": "0x15e4a6eaac3d4ee952f949b412a0578e20fada2d4f67497a091a0264e5a0a41f",
    "signature": "0xa08c791ea738be6ead92c2cec4f2dfd8ef108d7a9d39841d46518a472026ee7d2b86038e81d254287d269f2923968dfed8315e6493e9ff00cb7e3902f46f7a6d1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}