{
  "manageEntity": {
    "action": "Save",
    "entityId": "890495248",
    "entityType": "Track",
    "nonce": "0x7a9df8fdc0ed4928f23ebe5f1216843fbd228629448f6608366567bcfd9dacdc",
    "signature": "0xaf92b9744a9bc509eb2b76680916036f595873af9dad8dab271b0ab97f7b0eda5b3f6c0025defbda3851b9a1a31c777791fdf05ad74d3097940e5f7c19e622161b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}