{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "404",
    "entityType": "User",
    "nonce": "0x5561b40bf7c92b10337defc00f18ec8b5537792c6f09e4cacb7551f79c3cba1b",
    "signature": "0xdbce92e58a242ab7688b7af0c65022d08c2e322a642de197a8506e3de8dee3f0767b3513eaabeae89eb64f0d065050b651fcee94eda803e6d44728f487cf2d401b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}