{
  "manageEntity": {
    "action": "Save",
    "entityId": "657047997",
    "entityType": "Track",
    "nonce": "0xa26c442510a04b6677d024050d7a836148f6ad9e0849649580b9084936705486",
    "signature": "0xd7cf73a43ea38a2e17d91eb28306026cd31777ffb37a8752430f7b08552290a070a357263f9901209cef7431b8c2aaf56799baa88d2cc754967fe15be391e94b1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}