{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "63321",
    "entityType": "User",
    "nonce": "0xf8966dc232d0b40b343edc01c04fce42c6a3ef135b1acd0ec5a4ab49007c0335",
    "signature": "0xd9af2cdee6f3a94a258c6c0c87eb8979a423b0477d6d0bb6e7ec63860967c07448abcefcadc521d09fae308512f0a6292da637b2e169199e3b30e3a0c40f0ffa1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}