{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xb44f259ab4a3358b00a8a3f088048ae1ca0c564d681bd7a05b95171d3b0f9d93",
    "signature": "0x745b7f50cdbe483e19a9f3f405f40a57cea7e3f58406740d74d1bb915c611f4a608a115e2231fccc4d393dd021135ce7a4c247276c537d784a5cb66f75057fc21c",
    "signer": "0x485ACb39F8a8b43df52c225aF4f80e3f262fD24E",
    "userId": "637705400"
  }
}