{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739894776",
    "entityType": "Track",
    "nonce": "0xaa9e0d1fbf3dd0d7fc6d4790049e7633336bd603d5b2509c8d5c2749259db526",
    "signature": "0xb3c22ed1321cfd6322fdf1aea452c49d6aa6b2e47c61a7e9b855a7a0f386638e2e8680a7f6a37fa490457a472487371f146a8260e223652151cad497103800f61b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}