{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "319048",
    "entityType": "User",
    "nonce": "0x1391a97edeedc367061de36c9ca5967ac64764909797c0ab13bef9860665e803",
    "signature": "0x49aa60f5e74f0c16b366cd37fffec97f8854f0f5956c4e7dc9cb3785caeb8f9d73bbebed86cdd749b707cfd298e8e48dab95be706991e8b7000fca4462d6a22b1c",
    "signer": "0x168ff3b3F21912D4d676468A80Ee2af0E2F24a59",
    "userId": "124431641"
  }
}