{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "688960593",
    "entityType": "User",
    "nonce": "0x57cbd1e462ecd074906b0cb42d514439c7958361d81f047044ef5bdeb790a157",
    "signature": "0xa4d96acff7895e8c25528f46f9bbbe06108c4be483d6268c47a504cd3e8179c772ce32a5e8052ff6a39a795db5be28e5bbc7eb0d6c200ec93880bcd9ae6caf201c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}