{
  "manageEntity": {
    "action": "Save",
    "entityId": "877965232",
    "entityType": "Track",
    "nonce": "0x17e40ffc146bfbf2f70129fcacfc67e942feaf47a4285a43bc7ba634cfdadb59",
    "signature": "0x8d24a91b0182e254e01bf9b4ccddb880061699fdf960a6d627a8d9b8186133a95e1c113d7cc13ed792bebd8afeef0a24640d28fa1be4d3fa59e50a54d3dd43881c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}