{
  "manageEntity": {
    "action": "Save",
    "entityId": "195673810",
    "entityType": "Track",
    "nonce": "0x99357bdbf36f7156d8a9d085ce5a8b3064ee650cd1e48587c2b0bc1779fb3bbd",
    "signature": "0x1ebfb695a008a0201547e93afaceb0e738be07cc9aad0a1b4386006672c9a95056f4d1a5097beb63aa6be88d287936fb314f7dd70510ad7749a11d4aacc34e661b",
    "signer": "0x7061D02E53ede9391501fE7cc6aAEAec4059e8df",
    "userId": "618128736"
  }
}