{
  "manageEntity": {
    "action": "Save",
    "entityId": "801278",
    "entityType": "Track",
    "nonce": "0x36eb6d4c69cb2c2f42b17de0ba924bddc3a27b4dac3b8039635ce86b45ad71df",
    "signature": "0xc67f88c752a4e3d54381952b61f7bc24ad584dca47c16f79ed1efad1f1d303c7295fc54df603fd27f0a35b080605517dd9ea7f6d5cd8e78ef2e666ffecf16bbd1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}