{
  "manageEntity": {
    "action": "Save",
    "entityId": "1053751",
    "entityType": "Track",
    "nonce": "0x8bfce4877cb6283eb327630fe6aea9d10fba52501e9fca412a8f6f5800a42035",
    "signature": "0xcd4697bc3572c6250d8b25d98a4982d5f70d90ada485d00887ee6c456c793a772c7aad1b64a0c646ddcda20aa85f9e1d5079783f23a35a53ce6f530e17baf7011c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}