{
  "manageEntity": {
    "action": "Save",
    "entityId": "806980720",
    "entityType": "Track",
    "nonce": "0xca50bc4289fb672fdaa340cfa1c98732c7db2c42f81865a39700c20c78f568f7",
    "signature": "0xe17ee8ffc5e9639d8a48fe66a1ccc39769363e5e3397ef9e027fe878244ea9c00108407f37033e9ec9eec4f5e9da7c38b48c3465f4cfc4a147900265a3ff27171c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}