{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1450501",
    "entityType": "User",
    "nonce": "0xe101509e913645504caf636474dd2ed2751ef284fa6e3c4e384dc1c2253a079d",
    "signature": "0xc5e113a1041608e59522ba47cc2ad10c7b6ceab0915e7f0ccce2f34ec9621a044b4b4f8543c399ad975baa8cde530565f9388231b40d0e0b7bb2f7c358937d5d1c",
    "signer": "0xE0EaB915C3153F4a2DF5C6e7b8D58dAc829Fbf2f",
    "userId": "774741623"
  }
}