{
  "manageEntity": {
    "action": "Save",
    "entityId": "805600328",
    "entityType": "Track",
    "nonce": "0x6d65a39362a7be670f70821c53d3b13f7ec8d73de1fd8737ae70059d65ca3ae5",
    "signature": "0x81cf063588b67cb7014860845e4690c9c5725af3720ce1e47a5f59b8aef1a58077cbdb66d3d68c4e4f61586f8522284949699740e04e2bd7d19106e3ccd02ee81c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}