{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xaa7b5063f52f57a85f991b6dc16b55306b6ed8d6533cc071ebbf50b19333092d",
    "signature": "0x87415fe1b9fe47442e7e206430a89e2f17c4a1c47be18f175af10c7466e52d400aa3600cc7eb3791262a63c1c0bc451c08fea503e790576ae009951fe833b9ef1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}