{
  "manageEntity": {
    "action": "Save",
    "entityId": "1086918",
    "entityType": "Track",
    "nonce": "0x883af185fc2f299c1858e7be8b83e025d94cd580715c259a4106e39b2d3e9b37",
    "signature": "0xdf6eee53f7200eafb3f279eebca2ac41d22cf4a22d64c02994e50b96da642ddc4d1c50bcbd9b27926bfbd6ad392fdab20305b945063cbc672fb4056ed5dd0acc1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}