{
  "manageEntity": {
    "action": "Save",
    "entityId": "967771897",
    "entityType": "Track",
    "nonce": "0x828b68801b2533c1b828b37f33767d48af4487bc35516d355b93f84515336074",
    "signature": "0x73feef0f80c1c5fe7c0ab96d4b7eef9a62489ba684a510c415a05bf1ddcc31a16481005f29551939c0be2005e73b00471a385133de56954574c7a5b340473e3c1b",
    "signer": "0x45C74e4f36E4e5064C5321eeED3748fD52B04eA8",
    "userId": "133970929"
  }
}