{
  "manageEntity": {
    "action": "Save",
    "entityId": "692252194",
    "entityType": "Track",
    "nonce": "0x83e42c4ad3474529910eb9ddf81cfed55c31097af074def5b0e82eadb9d650e2",
    "signature": "0xfbfe62e2fdb1eb7f06bd986dcc2ab1ab91d07e73cf6e5f0d92cc4b803a57b85f79d51c6bbdf402a61d70bc873c6df4415814efdddd470e9ca2c6d8bf63aaccd01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}