{
  "manageEntity": {
    "action": "Save",
    "entityId": "622320",
    "entityType": "Track",
    "nonce": "0x233fae52196c22f97a28f3de52a18612907edc9546fa094b0fa59bd26face2a1",
    "signature": "0xfd974926a1d0ef0245a8598eb8c192e4dfaa7cadbce4c0ef0dcfc8c798500eed066078926223339ed7b0461c732696c520fe9f06ede383a9261a5cf760e5819e1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}