{
  "manageEntity": {
    "action": "Save",
    "entityId": "1672416718",
    "entityType": "Track",
    "nonce": "0x87b8d9e4f2c9a050cab85d22ab3314c222f905924351571ccc2eaa173926e271",
    "signature": "0x2bdfda8373e27b49ac22bc5cb1490d1182012491e769ac00b0e6d346bec6549f040eebef894fc63d8cf8da2b5303993d0345239e5e8a7f1a55006a6ba8dd50521b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}