{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1666731",
    "entityType": "User",
    "nonce": "0x7a72563a33afb951411eedce6167eb3d4e662921de4d7e470964e8a0f9306b10",
    "signature": "0x7674b4bdb49010c63123fb1276c3c8d7fd20529998dc4d784fe08f5d4c07dc597d8590a854077b24cd032e00dc4d04d70b18ce33a5380ad6b9fbbe764f521dc31b",
    "signer": "0x8B50B0687712445cB22f8e1232Be42e560bE3deb",
    "userId": "487640022"
  }
}