{
  "manageEntity": {
    "action": "Save",
    "entityId": "812742138",
    "entityType": "Track",
    "nonce": "0xbfb825b564b014f76189216b9decfd05bf169b7647b468b32c3bd1ddcb746ca7",
    "signature": "0x323082271e6bb5e20905a757975f75019ea269b5fb77653080c8f6d23b7e720d76e1456a3ce27e0ba8e3bf91a2755ea719a302e32e641a143e7766f9ab79d0db1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}