{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662756119",
    "entityType": "Track",
    "nonce": "0x9ecc57c4710d0a80d73966490bfed4ec8ad780bb3efe81bfe98579bf065294eb",
    "signature": "0x8b5bc4aca517c75f4391153ec078733c2ed2ecdd5962ec85dc4d1e504df61d5533a9148f3b20fcd6b6238c8b21642baccba431a7841783b38638c3ed8d03c16e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}