{
  "manageEntity": {
    "action": "Save",
    "entityId": "1806564031",
    "entityType": "Track",
    "nonce": "0x0a4a2d9c07f945e63ac0cec9c812600f2b59bdb7733b3e80b509963587ecc5ed",
    "signature": "0x85aeee078338bc27231d42000633c83ded2e071c0ecf365d8ea5d92a5b8d4c7a7acb9fd11209b432aee9fd73070ac1aab0790943c57f4a44c4e802be7d2e48e61c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}