{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x534fd407d2e0f157611ed6676949a0b3d586e2a66188a70ca3dc27281c26aad9",
    "signature": "0x3a0bd1226f5fb16114d037313068817f98808132bea65cb3bd56fc89cf50e8d22d512e7640e40add83e0bc14eabac9db25b4eb74f1050515ded5667144da40bd1c",
    "signer": "0xb7FB61127f6E78ab910D1330Dd706ae21eBa28A3",
    "userId": "509785341"
  }
}