{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "554379379",
    "entityType": "User",
    "nonce": "0xe51955b0ef3aaab6424e0f2e95ed2f50eef0e973aa4d873dd0f351abd52c7f86",
    "signature": "0xa208b626e2f0c00317dee12aeb46490df87279619dc2eef768a212ad6d3ce19239ddb1c18fe56f231d94962b5b470791f2f0708a510dd646f268276f77e6955e1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}