{
  "manageEntity": {
    "action": "Save",
    "entityId": "1063423415",
    "entityType": "Track",
    "nonce": "0x807d3fd53b23dcbd7e4e122009600b35a95dc4acb118a9a31dbc903802397be1",
    "signature": "0xb4c0bc9a3099ebba42cb41c4fe75b27ac939d0303ac56504266ca612961094566e11c51b9fcdae8a3c391bc84d99c0d6ffc2f8dee7d869e7203ea3d271852e751c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}