{
  "manageEntity": {
    "action": "Save",
    "entityId": "415347",
    "entityType": "Track",
    "nonce": "0xe63320d29867633e9cfc2eea8a02cb81d41cec54d8fd64fc834002c839be58ca",
    "signature": "0x8997c610d4239c237b1c92e8e959e436a788fb7b6be2dba01724ba5401450aba12644564dbf901bdb571e992888dac3f8ed6141da22477d2a2953d9e40663a7b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}