{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075029707",
    "entityType": "Track",
    "nonce": "0x7cd97d7cbd11d9726c57e2d962331acb728b4df35b9e606efb43af41d965eb34",
    "signature": "0x9f840b8b8b38e6cc7f269c9769796e8225ac0d079e1d24e0218862ab9647347a17f1d1ce091336732821e1b36ca2e1039f02b0dc8e8a036830d37de783bc45a01b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}