{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "394678487",
    "entityType": "User",
    "nonce": "0xe7e9cba5251e8596fede0d201a258eecc1357c4fb9096e2bf582f1ccb060d324",
    "signature": "0xc3bd1b19b05b594ed94031363eb1ffe8bf731ace2072c23be2648581fc3f0c9159273b3ea11953523f9105264e2025fcf427a9593695fda09ac12c810d3f4a211c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}