{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990836999",
    "entityType": "User",
    "nonce": "0x7b05a3485567819201c49a1c1b209df0c2ce78af861d28915324727cc0583129",
    "signature": "0x41db7ce1528cbfa591061e0bd4a72b25e4cd0e05045d260dc8f15bbad3698e925f39efc74dbf2b528ac4e06dafac711d315029be4b7d173851cce4bdf096e4771b",
    "signer": "0xaCEa944E637Ed70d0846f218FeF88B644E2AA918",
    "userId": "221007610"
  }
}