{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x8dc399c569836c7bda7893e989e35cd31a950f07b63f43f6b1f0fb98c0e49cfb",
    "signature": "0xa572ee207a9910d1d5c6aecf0e412d3fb30bb28746fbaf3aae97c2accbd411a34b88475aad4809f1a416a2dddf8457f61d1beeae170bca3c9dc6cc33ea6ec9811c",
    "signer": "0x9E887e026105e890d22b9B4c6aFda62b5026c49F",
    "userId": "728713419"
  }
}