{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x6dd37ba09488aee6ed37c4c9299995faac2b26ba0ed6cc54d26806e1b79af5de",
    "signature": "0x6963915b20ff45ca5e768df0504e19c06ab4eb801df2aac1716c015cfe0cb12a5cee8aa4466ad6d6faa30ab1352d8856d74d506a35171fc7710d0f488c4cfed91b",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}