{
  "manageEntity": {
    "action": "Save",
    "entityId": "1671548960",
    "entityType": "Track",
    "nonce": "0x94450ce1d34f9bfedfd2cf31af5fde5d6cdc803f132b987f237e80669f2420b1",
    "signature": "0x118143faf1bd49c470da1ccfdb0266ead6fb5e3e8d71118a7de7d7f1d1d2027d13ec8433786fa5b34453f32adfca487e5a1ed74f833b289fc79e7c25b70991641b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}