{
  "manageEntity": {
    "action": "Save",
    "entityId": "1922101367",
    "entityType": "Track",
    "nonce": "0xa61c842d400a283e07d8a7a81232387445f62ec9ddb6159803a7d0e8ddd77695",
    "signature": "0x75afa0281bf789a1551d955bc7d0423b56a94a0a02081cc2aa425d50f740e9563befefbd99ec38ca006be834ff1df987201cdcd40bbd6228c0bd52bb8267e3d41b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}