{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x38b5214f9f2e2187f76511171f9549fbfba5c8d111b871df72da93512b80ff49",
    "signature": "0x69b0ca22338edadae4e76d5737c83ac9ad054e0f161bbc58a13fb11a3405b391695861f6291c258b6a084877bb3ec5e0122bcb689916ff21dd39b3f775392fb71b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}