{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681864718",
    "entityType": "User",
    "nonce": "0x3e437cd3b87965a127bc3dde2811de4b349eebee2cfaa0dd453ff6a867744dc4",
    "signature": "0x21af1f98958d342502d56f9c047b0d40c313ba6cdcc4feb443dae7be0a4e1ad6359c8cfc5ef0bceab7001bd3a762774a1c71d651a84985dddd7b9dfcb06c6fe91c",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}