{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1880649",
    "entityType": "User",
    "nonce": "0x705cf1ab793c49fc2c3e974db0ed9619dd3b190886c447cf2d19f7d2a3a68f2d",
    "signature": "0x77a8fdd93335cadab1a89f1f898ccf97e4cb2ac3790ff029cc0feedbcad61c232679425543c53deb1e45cf34a323cf039d8e0c1d43b629d0694b39a61bacb0d01c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}