{
  "manageEntity": {
    "action": "Save",
    "entityId": "586573438",
    "entityType": "Track",
    "nonce": "0x45cac7975df9670c1d9d02f473eac97f1f89f8d676b93e011404b9f45ef0215e",
    "signature": "0x51a928448f33103dc49e207fb47222329aa8bd15bea05c3e67d412feeaa62c214be7cd59eed045c357201ab5f8138b754f403d212eabd5f9925f2a513f007d151c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}