{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "819568368",
    "entityType": "User",
    "nonce": "0x8c373a2386f3b8045881da2a12973076ce9235af40e2724910b25e172f29c4e0",
    "signature": "0x74240175982868c3a8a8ca9515d92d1d392c55341469b10725573156ef9caab827791c34f36369ad36dc178346d9a220a7052b54dd502ad94539a614274091521b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}