{
  "manageEntity": {
    "action": "Save",
    "entityId": "699091460",
    "entityType": "Track",
    "nonce": "0x6c666f1f9e6e27d6db6aba0db7aa7a24ad30ee317a5754ac56fc21bab11f9f07",
    "signature": "0x9cf02a8bdf27fcc59dc3be23726b758b389305a5e733a6874879d00e07ff477c4de19d4bb18d58298c0dfcdacec90b8bd43dde9c2625eb5f3c86ef288030cda81c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}