{
  "manageEntity": {
    "action": "Save",
    "entityId": "1046986",
    "entityType": "Track",
    "nonce": "0x376e3f5502159690124d76e24858b28c53f0be694d3bcb70c95f4f6c07acefc2",
    "signature": "0x4bf342f90d9672dce3f2e9c2a9787e39b367e6bc13faa42506fe241989b1c7400ebc5f3c899419e78e53fc584e28aff55cc7f0871943ef1787ca793149f0a3051b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}