{
  "manageEntity": {
    "action": "Save",
    "entityId": "187078266",
    "entityType": "Track",
    "nonce": "0x5bd034ffddb734b5f84f4cdcd1420210af3fa0e6042c641e32a2080bc53e0731",
    "signature": "0x0febda922d4a7859a1a7bdd3622321c7373411b298f8965e9194c56b5474def11bbab05981d19d4ce2c4da84704b4461d02497ad08d6b3fa5383c590d65233b51b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}