{
  "manageEntity": {
    "action": "Save",
    "entityId": "1787556542",
    "entityType": "Track",
    "nonce": "0x293bb5c0bd861bea2c4ee68f79661f7432bc5d98c4cb88c5b07329ef36526bad",
    "signature": "0xa6441d71bfc57a3002f82c97fec40eafaeba8bf760e626d68b88690cde8353183ad7464e4007187e7a4ab40f9b65e5c6ecb9e78b2ade6b42b9f5e09836f129521c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}