{
  "manageEntity": {
    "action": "Save",
    "entityId": "764353882",
    "entityType": "Track",
    "nonce": "0x149229cf17058eec2411188cae62d266c8b594fb002d89ab116d395a37fe6489",
    "signature": "0xb4c112872175920761dc0b5bcff4d593d1d27542727d29d8a667d1431fe8c3de65a2dd3aec346a6b7facefd4cb0566fc3319451cf55e1cd2c803ff2a4435ee3b1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}