{
  "manageEntity": {
    "action": "Save",
    "entityId": "790604123",
    "entityType": "Track",
    "nonce": "0x2e8a1daf91071d6100a713547d5c84037a30bfa3817d3fc0ac7d68da5d77367c",
    "signature": "0x31c47508557be355c8798a808a505db5d348adea1743a12ce330f0edc2b3bb6e4b2d2577df89efafaa24b5d68e317c72ce847cf32064fd63acf8d3c914047d3f1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}