{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "550230194",
    "entityType": "User",
    "nonce": "0x18dba3c8c657b3fdb4582cf94bfc4b195f4e739b667893969636acd1ea8201d2",
    "signature": "0x0f3a98e0083fefcd4cad7bf2859837747f7895e0b8b65a34a56aa86fd409a288110279b9c4ad8d70276d3981dc7e1c508bb8b6c22e3a3a3a0a2572cae5be23b21c",
    "signer": "0x0E6Ef8dF2F401D8918d603B82ef321D94A721556",
    "userId": "648802251"
  }
}