{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0xe3f43be35423d55979c630408590c21439986803221124805ed19daecf735831",
    "signature": "0x7ef1fe10127ab66ab41b3520b789e14d6a11e613079e3a3c05acf04ee2b0fb3c6ec3afc3d6e7a70a1d0c10352d76463862d9847404bb91df2cca6c93a40f57571c",
    "signer": "0x648641b8343AC9819Ae81C3f57D5364689163C83",
    "userId": "64916143"
  }
}