{
  "manageEntity": {
    "action": "Save",
    "entityId": "274885",
    "entityType": "Track",
    "nonce": "0xffb17a1ce7e108bc9a09e6085ac2767fd480299dd6922c6c1c2ab2b88b641f74",
    "signature": "0xe01e6528c0ccc0517cac0e831b5f750e30e14df737cf7de4b66bfbc6c2329a88704efd3197d0da9b69508452108b3740813f001ea81f16cda0935ffb9c59aedd1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}