{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7a54192c114cb0cab313af57bd152920bac21330af70abad055eab6525a1d9ee",
    "signature": "0xbb4e5b396c3155de7406cf4a115739ac025e30d7a8737e040e53ae03641de522788f6ddeb8adc97de14bdae939799014e00808472da30ad2d787f16140d377dc1c",
    "signer": "0x925631F424aC20FD207cb6E12010AA40C60fA2c2",
    "userId": "567684694"
  }
}