{
  "manageEntity": {
    "action": "Save",
    "entityId": "1072135",
    "entityType": "Track",
    "nonce": "0x31a609451493139ecf899ed76bb0da2bad924d1fc42ce555b13c6cad02d4bef6",
    "signature": "0x3a45fd08662d4ba621b7af1e47c72cd419c4d242f4833c136fd5f7728839fea04335a61135972ffb9911ae913d750e7d58d5efe5cb15e44141482466322612131b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}