{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "887547386",
    "entityType": "User",
    "nonce": "0xb65af90b506f709a2da7ddabd214023ce859957cd47a0259bd5b6c3f8311e42e",
    "signature": "0x5af858a7b123fbb8d0b3ebed7ae15a435a2bb2b76a789c42b01f4b8e29248ca4268adde86eb0e2a4ad847ccc09ae479f51ee0c3093f1ed140775443dd9c256951b",
    "signer": "0x16D3bf5a80bAfFB2f1550d49b1203D4CA532DA1C",
    "userId": "1994482"
  }
}