{
  "manageEntity": {
    "action": "Save",
    "entityId": "1657045283",
    "entityType": "Track",
    "nonce": "0xcf5d6689d6dc5fa6fe1dbc67334c6eb9d8ef65a13e7a65feb464d590bfd56d4e",
    "signature": "0x8a5581f2799ff168bfb0972bc7a719e5cce820b407f5a213c796d7ebd540e304765fb43121b98c11bbb9294ee7ef6ff3da3f9c8c6267a87e3116e50e027be47e1b",
    "signer": "0xD71D6a61b797d5436c8d291306fd7DbCe6257Cc2",
    "userId": "117522"
  }
}