{
  "manageEntity": {
    "action": "Save",
    "entityId": "2138028025",
    "entityType": "Track",
    "nonce": "0x86d091c828d50e20c917ec44def9b284883f1f17381ca98908771102eb9febb8",
    "signature": "0xbf2be0f8558b6f3fd41ffcf5d977b5b0a53a466e9a3fbbe72b5099bdbd28dff35df7af9c1a9397a77d8cc790339ed7e482dfc8ab55f1d5e590ca23931ce9762a1b",
    "signer": "0x1b4ABFD88A9dcb9B621F6Fe04fB553B69fACf506",
    "userId": "581840462"
  }
}