{
  "manageEntity": {
    "action": "Save",
    "entityId": "463363",
    "entityType": "Track",
    "nonce": "0xe0a90c70eb9b10b1a4a75d328d68852822863e136c27081024576110699779a6",
    "signature": "0xf5ce47e88fc957e73c1190517947b875d71de7147896d6e4cfa3b585ee92cf973cab6f112294a48faff04a8f939ced7330b1181458d81c36668e7d577a367a0c1b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}