{
  "manageEntity": {
    "action": "Save",
    "entityId": "971636413",
    "entityType": "Track",
    "nonce": "0x0a686cc0df0ccbb6b3b04fb92b6628d15e7acfbe14694ed916cfaec03cffedb9",
    "signature": "0x43b22dffbf34819e287e5694b4c6aa05b14b4476bff26646b482a7c79ee0aadd668bceeefd12fb4168176cfe65c38fb5bb4ba84a26eed162b73aeb473e06aa9c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}