{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x542bd9eb5062dfbd3eeeef0f944ea7ac3cc0824e5af7603fa47fe014c3525678",
    "signature": "0x80a3a886236326fad1dd5e0ae2732b7f343657d1540fa5f1bbcd595b748c39e31b9282bd9876ed83e44f7e5401a6af7aa9bb0be466871434add013385c8d80b51c",
    "signer": "0x5b2F4e52C1da407B9e7fb52524340D4f97D58749",
    "userId": "68014846"
  }
}