{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121616299",
    "entityType": "User",
    "nonce": "0xd2235edb4678d7739a636bb304c85c8761d99c36f4865fbd27ca64fdcdc8d17a",
    "signature": "0xa7cdfc265ef313af9cc37c8341e62d27dd2df6645a488d241916f1d53387d1da3aea0e03729918f59fd24ed22ece2d9e8b0cbd199a29829823b480a88d2311011c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}