{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xe7c6e46b74b821c1e0537ce1371712da5484c8379215f48005d08bc0ae953d8a",
    "signature": "0x7f8046ed98b13c2ae757abf143e1eb33ca392990c83acb801f632e03f2677abd2499eac2f962fea25c7645e2434ba8bd0cad65417d4df07c2cc4827018825b671c",
    "signer": "0xdF9487164dE2249ca747A2fC5A6dbe6D6392F510",
    "userId": "308281501"
  }
}