{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708291620",
    "entityType": "User",
    "nonce": "0x668a42ddf30b4273277a0a10a5a46b00a3328ed0eaf7f3e5d7cd3fa3c6f0c79a",
    "signature": "0x620616ed02af3a5d92292fe1876497f39c446aeb88c6b948faf0ef53b403d0051445f201d4a28919c148aa181032935332c184f3e98ac38e2fae6e4f5ed987de1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}