{
  "manageEntity": {
    "action": "Save",
    "entityId": "1498107242",
    "entityType": "Track",
    "nonce": "0x4d36c6ded0dfae9f8f328175b3c71feeb5f4b5807b57452bea0d0320c55bb389",
    "signature": "0x1a947d170901a38c9ba2040d43e9b5dcda6c721aa38793d7fe6e4ff663aea8b86fa14dac414f4826579a8c7553bd1e8fd06ab7f3f768e8716c664f71ea6c4d951b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}