{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x0976d9564ee944decfe7dfb8add348e49f8ef9c76a3f9ee4b49a615777d52571",
    "signature": "0x9fbc54630e4dfa1be592dd953c802a28087894ef2543b82bdb20f9792b4662ee1e6ab922628e9a8f2561b57022d4cd6fe8a63da9cbf7e575e2ee376b17a09f231c",
    "signer": "0xe73aaAF4Ef37B1326a89C9Bd10a24f28F66ab656",
    "userId": "189375294"
  }
}