{
  "manageEntity": {
    "action": "Save",
    "entityId": "460988095",
    "entityType": "Track",
    "nonce": "0x74d8d559a5f98344ae3a136a15ad8bf82fdd51ffce7d75bb067e928c9ade9bad",
    "signature": "0x5d00d94b31ab7aefa717303da8f22f5cc90548d7da75d4bff1c561bad9eb3cd024c41b6fc75204754c6035bad9295588a81a9779f81b41d0ccdec82be062d8b31c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}