{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "303867964",
    "entityType": "User",
    "nonce": "0x912858c23937c23c2c4ddc4cd6a34e4d7f9f9880fa943683d45248d9a4e25d4f",
    "signature": "0x0149260c90f5b40ecb6b7cb3b652ff4d9476f33ead58e8e31a01b29e72ceab3f23d815a5967808dacb1195187cab2ec00b1fe50a64895399ada0909b21aa25311b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}