{
  "manageEntity": {
    "action": "Save",
    "entityId": "800190",
    "entityType": "Track",
    "nonce": "0x35760c16f602ee9427fda96562c02f02ae79808e8ce07856f9afd866a8b763d2",
    "signature": "0xd3f0caeb308bfb219dc42b02d9d087cd949236d65b00a7dfa781c315942425ca28c8c1a6a65854c958b2f3e68b954ee1ef56eb5e40597705068280c5fc59c0ba1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}