{
  "manageEntity": {
    "action": "Save",
    "entityId": "253806585",
    "entityType": "Track",
    "nonce": "0x7e1498e76abe0ce43ae4bc75f26cb9f14a94b9d583c26e7a6638c60636a17c5a",
    "signature": "0x2e6e1afa902be64ae3b3c8b44693d1f85085d60e8042176920ded50d6a2b5fe159d5b971496655a8866cfd5f28270c05009d70d62bd833588644adabde8efbc71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}