{
  "manageEntity": {
    "action": "Save",
    "entityId": "28218359",
    "entityType": "Track",
    "nonce": "0x46aea98edf8b79fe7a7c4f2992537bdc0703d9c9e348288dc643bff1586a64ce",
    "signature": "0xf65732cf7f1bd6987eb06251f32ceaa26b5730e3cd44e8b0dbd7c926e6a677166061a6d26a3877cf682d9f612f16db5ea0f51a2172dd38af78178c8acb3eec981b",
    "signer": "0xd708949D0521A856Ca6eB44B4112bAEE59741ADD",
    "userId": "490478463"
  }
}