{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x21fbd9e691771e50ca0a539551b103d260324bd4930eaad1fab355d8a51acc08",
    "signature": "0x946a869664a0b25efe4beb471aa8b83901497c657321b276d9d53626e87fc0d65a3a1ede5039389bf6eaa78925064ed3521796fb3728f48add3b625025dd98091b",
    "signer": "0xa2cb59F34B214Ad2201cb8EA941F48ddd366142a",
    "userId": "10724789"
  }
}