{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987199883",
    "entityType": "User",
    "nonce": "0x6c10716ab40c2743ebfa6f42b1ac6636b5b51a4609a24b37e6c6da6e8b86298e",
    "signature": "0x64ccca20f68e99feacb0596b5ae3defc11db91ebc14b8b190772de4572e05e8d781810af03ed46d54f0652b4e19705b620555cdce7e3ad92bf8a504809e4713c1c",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}