{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x809fa3e3fb3f7cf7d0693cc96cf24cb04645385d93e6942756353abcc9d3b854",
    "signature": "0x97fe4e78f5cc8a83cd8345acfaaed7dae672101d0cbe7faba54f6704aae74e206df1e2816b3bbfec8771e78cb2293a89549e68e42cbdd4203cf030e1b3107d891b",
    "signer": "0x257c9f4A9563d6A4a2bF3be7Da1738e167fcF295",
    "userId": "301719964"
  }
}