{
  "manageEntity": {
    "action": "Save",
    "entityId": "698822",
    "entityType": "Track",
    "nonce": "0x2440deeddbfce33ed876ca157fc6a6b4627e67f5ad8a9dbfc2c7e584a28124e4",
    "signature": "0xbc544c41997516cb30f60112ec42858b235ad8c3a156c4335af8c9607bbbd9963fd8425b047f42faec9ca96d2fe0ec5c76375bd2a331956afa7728ff3fcba5c61b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}