{
  "manageEntity": {
    "action": "Save",
    "entityId": "326923337",
    "entityType": "Track",
    "nonce": "0xfbd3dfe66b38c549e2717c39c7a052c9fdc7d6e5d899cbe569c61e2e859ad533",
    "signature": "0xe379a3bad3d4714873eb0fc2ce6bb43fafaee024db9e173eaca84456f1298a771baee5d0dc89c16bf8212fe3f6b8003450eff2a0aec289426cd43453d114443d1c",
    "signer": "0xF11F60bFb591E532d6E71E699ddfdfC58f377CA1",
    "userId": "458027684"
  }
}