{
  "manageEntity": {
    "action": "Save",
    "entityId": "426428035",
    "entityType": "Track",
    "nonce": "0x6b6d6e40912296a659dfead37a61233b3b15d197f2014fc2e366d78b7828949b",
    "signature": "0x967c872ad877ff876359af2efc2145c30dbdb4939cd764abc6dbb3a89a32f89e325e7fe548b906ab3dde3a021d8f10633bfdcb501baa7ffe3bf49905c28b67e71c",
    "signer": "0x866c9135AB994f6F3351c1ED8F1c3f8bA8eDDafE",
    "userId": "954104006"
  }
}