{
  "manageEntity": {
    "action": "Save",
    "entityId": "330373801",
    "entityType": "Track",
    "nonce": "0x4aa301ea0aa8b9ba13736e279afa3bf1e599f626822ed2bd60b2e5399076e270",
    "signature": "0x7942a7272312df4573ce14dcb5baab971b75627f9d48921d681e1a0521ba727820810febaa45e894730acdd559d4a6f96c21d732ac22804281cf721b170dce471c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}