{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6e3637ee93efaa73b771d5e17ba79c0b72bdd87f41f943c229679035f059b96b",
    "signature": "0x8044bd3fa0a737cf28248f8461e8998ec90d5d893a20d97091c6c9f0e2edbab412b30eeef23df68036b6349725f423b1566137fb8daaa0d470664a56fe182b121b",
    "signer": "0x864112DB1ec7DdAB646d2db2F7ef578aF73c683f",
    "userId": "402395123"
  }
}