{
  "manageEntity": {
    "action": "Save",
    "entityId": "541030326",
    "entityType": "Track",
    "nonce": "0x11b54a38b0be7a1a70994920c828dd36364b93df9ed60dff10331587ff14175e",
    "signature": "0x4d6e8cf9715cf20b6e88034c9e1df6513ed1ad891c25c8da04f8eea69b84c29556ab3f1f63181d6a87f3b2bc55e77858ed895c195abd6430dc5cdfa061678fc81b",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}