{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54015",
    "entityType": "User",
    "nonce": "0x3b8d08db62163b2c5496c15855076c27d9b399330dde9952229fe95c616c3f6e",
    "signature": "0x6cf66ba10c6f4000cce7342ea10f6be14f2b47486a7a9fdf97d20e619c195bdd5aa73f8a2170480c925aba5abcef4d0faf16509d446fdd8f36d3551064a83cc31c",
    "signer": "0xd12A323399559A3773F865c8F21031bc39c29135",
    "userId": "219968466"
  }
}