{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x12612abeea16c4d0535e3fc011ca6bad97495db5552cc1db634150eb03f515a4",
    "signature": "0x02cca8611bd7584b0e688398c529c00c1d30bf05fa46c816ef66ceb160885d0852e87416db271def66f4e4adb7c913f47acd9a051797e98c4200e4ce5768acbe1c",
    "signer": "0xB3C37a4A1EF6a2BA2A01345d6051e6C118DAE949",
    "userId": "421474060"
  }
}