{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255893436",
    "entityType": "Track",
    "nonce": "0x32fc1d69e5de81059c3c647e22f6f8b71cf21593df7d9d97fe6dbcb73e4d9a0f",
    "signature": "0x7174b88eeed665e862a8d799d1cfdf22087bdb8ea72fcd38e4b9617cdbbc6085352a0d72898025b5b4ab41f0e607d1d6624008d30af1be11042f033ccbed77651c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}