{
  "manageEntity": {
    "action": "Save",
    "entityId": "11441101",
    "entityType": "Track",
    "nonce": "0x87c23e647542190cbd718aecbaf1a1ae03915bacac6ab9cfc14c53eda4d9834c",
    "signature": "0x2606a6531f1ca9c4407fd13b6f3b8ceeb455a5dba51f5f797107844ae32306cb2d67362497e5436d9f56dc1b5cdb1f45b10a00cac8b1190e5b69f45846d3dd2d1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}