{
  "manageEntity": {
    "action": "Save",
    "entityId": "1696723005",
    "entityType": "Track",
    "nonce": "0x4e22c51e012c001900b21d071cce5cde8420f0a37c9f829213f0da3f45c6c508",
    "signature": "0x4dc4635c5853f92c3b3e4233b75e730652132f7215cb19f5550d09a0f3e826885032afc059c6db2a59af2824133baf0f1b2870e51a7c0fdfd912813b7c1e57a31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}