{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x14a75538c4778f7b9a181f097035aba5cbf1829a6b3819e48f5d190583584888",
    "signature": "0x28cd580b6d729a1b7d8d321af7e3532e82dfdd861a841f2edef82a981f97c33e5c3c4f3f29867177d5f56e8fd3e6fab314a3ddc38038b7f191af4909680ca0301c",
    "signer": "0x2a7A0F3C61F765b14f790182920e5B902a4334A3",
    "userId": "764482457"
  }
}