{
  "manageEntity": {
    "action": "Save",
    "entityId": "133673250",
    "entityType": "Track",
    "nonce": "0x3d28d18d8839fa966b6b41e85368e4d264c0ad9554e85ee473025513d4195d14",
    "signature": "0xfd64942609e1cfe637f6d4129b49e624ccd19db074cf168d149fee953785b02e6cef49ce1960329bdadda398bee421ffbc07aaa07a4268566395016ad0d7f92d1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}