{
  "manageEntity": {
    "action": "Save",
    "entityId": "720344",
    "entityType": "Track",
    "nonce": "0xe278eb8de4e9cc58be8c1c82184101e3abcbb258299fbb626df520075c5d7408",
    "signature": "0x6465b9faa1638c928d19206f318ae98527fbc7de00190bec31acafecc5ee9351255063e4f3df26a742750030c0b977576b8ad2bb239993cfd495034b7f3a78c61b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}