{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "144",
    "entityType": "User",
    "nonce": "0x18b74011852acb63ae038cb7356c32e9431458ca5416a206964064a2bc4365f5",
    "signature": "0x9c8edaae4fe4888e0ae1f0379c36c24a9740aae3998efcc355d719082ad1a8ad08ab39be1911a60940295bf3d8b55cae443a0bc6f2e0cc04dfdebecf1a59a39e1b",
    "signer": "0x75a075dd45bE38AA2c27754D97d5d84dD624FeA5",
    "userId": "451351"
  }
}