{
  "manageEntity": {
    "action": "Save",
    "entityId": "966144992",
    "entityType": "Track",
    "nonce": "0xf55a07d7bae07fcd2bc23f0401177106c723b22c25cf60cfa32687955f8e387b",
    "signature": "0x0a9abe936d6598ac3dd76992ef5ce639858fc0241b4b91ecfa6d722ada7c84f844fcb2a63ce921db061daf9aaf69c2c5a58818c50d69043baebace7ad7d058ab1b",
    "signer": "0x21Bf75Cc555eE0A19Fefc54665189807c73DFFD4",
    "userId": "833426398"
  }
}