{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6c18877d274c556ccd4340fd84828a65c84b075441ba9b51de01a62eba00e565",
    "signature": "0xb6bdff8d97cc2885e0bf077e87e8527f8d6d6dd16ab488665cebba9afef2449b434f4ef2a4f0fb3fc54c3ac7d72d9697d4e1bc1a64eb453582e66ad8231d710c1b",
    "signer": "0xaA7359D75a4445a569c53A8C47CeCB62Aa739AB4",
    "userId": "136519704"
  }
}