{
  "manageEntity": {
    "action": "Save",
    "entityId": "219181264",
    "entityType": "Track",
    "nonce": "0x72a05a63491e6ad6564877dc298645c01a071403ac6b6b882f871520e9f48ee2",
    "signature": "0xcaa3b97022971ecdcca27801d1853188f8f2650577adf6452af95c3c065f80f261f403d2d88a23548c99a08ca83d482b9359a2a35602864ce33615453436cbfc1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}