{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "306603",
    "entityType": "User",
    "nonce": "0x0dc19a36f94ee7bb9bda14d90a3ddc843fe5431d9a8ac753c7ac5e8c420603ea",
    "signature": "0xe8e4f6ff3ab5f85b181acdd29223b8ac91bf66cc61a53711d7b493314cb0dd79665ada24839b8001e6e55d5c70e10dc0f3c78c72c58053e30783b990ce5577db1b",
    "signer": "0x5f669126A64334710E37f472BfBfE0D8cF408577",
    "userId": "171892"
  }
}