{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "71912",
    "entityType": "User",
    "nonce": "0x57997643621f37db908957ba5930ba56ef4c626687c1d684ce20c6d955c5d4d4",
    "signature": "0x8bfe9be1b1c552069e42906a379c42398ad4e8b993432cd473843360ed1a228c3875f512052f608dbe204e0f959b4a87075087343d0593a57d21210f67b11ade1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}