{
  "manageEntity": {
    "action": "Save",
    "entityId": "789132",
    "entityType": "Track",
    "nonce": "0xad4a708f430c511d8d57be3eba1d4bef1fa9145ac38b3f26e78dd6e5aaaa8755",
    "signature": "0xc485dff5b64b950cc7efc16521b6ed8c6238bfa2a5f0b5c39acf4cc2a332099b1f45a4638b1b199f34c10d8bf2710fbf8dfa03dd5da2f43f3134b25dc9d547621b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}