{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "481785860",
    "entityType": "User",
    "nonce": "0xd28df4c85473df6a313e4167650d70cbcf343f6e7131a3a644cf31680a33751b",
    "signature": "0x1afaa5556f38d8e5b38508922717b017b15bc3b55e25c5d5b9d9a31345850d98621cc3bc7aa7141755874b70138dd5ea9ad8c1e18d413090a39b20437fc688261c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}