{
  "manageEntity": {
    "action": "Save",
    "entityId": "418704",
    "entityType": "Track",
    "nonce": "0xa948fb591aed43a367808edc9fa0dbd15c5131087badd423675976210e417863",
    "signature": "0x99a713dc7487a0b08bd4c07d4f902fae74d0b04e7e3d9f69b5c5c310e993fd8739dca768a3032ee2bcff89b46030e7739bfbdd0aaac2899d7420f65631265ab21c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}