{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "550138957",
    "entityType": "User",
    "nonce": "0xa5bf9c468c12d995ceae874ba0b3518b276ff7d98d65454d1fe8faa1f9f94e26",
    "signature": "0xc6acd12556cf657e924f2c676e6bf6a4e2891def23068332e6cb1e93a64b12287bb1e202ce8c2a2936b4adad5b686d455835b9c93edfe5469d635663b163ab3d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}