{
  "manageEntity": {
    "action": "Save",
    "entityId": "480253",
    "entityType": "Track",
    "nonce": "0xa295e8f69c8d6ab1547e1d8f8a00cd3ae6a68f53105d43972c8c6b18ef0f0960",
    "signature": "0xe23a75e5e9fd6412450ef832020037463d6e566d95471cecf67690ec391811f041b83bdc1e35eac9bc7b67efc084d393dd5e575dbd965fd3173a6d92bc20cf661c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}