{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x44bf45507f2849bb5f7ad5eea543fb8adce4c2bd88194fabcdf61f0f259c4987",
    "signature": "0xba9baef6e12608e57a7807e33a9c530e7198ea14ee4ca97b0e5dbcfbe1beb14532cbf2b2ab1913ce65bb63ee02f5637382767d1e32f69f88820907b2f5a85e301c",
    "signer": "0xc981d039042087dfB2b78d9309AEB19Caf6FBFB0",
    "userId": "177000451"
  }
}