{
  "manageEntity": {
    "action": "Save",
    "entityId": "373921965",
    "entityType": "Track",
    "nonce": "0xafcc8e1708cc5f30e261139076cf2800ed46809fde046311c5af5f7d7458cf6b",
    "signature": "0x81fc31c1e9ddb15029bb56098ba7f588f00cf914b56cdd0f9c0a192d3aa2bcf54761e82afe6f922eb1608f07ccb23fbcdddd6f4a657d5601bfee37f262f1f8bc1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}