{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2599",
    "entityType": "User",
    "nonce": "0x4ca1415bb89716a2c35a4d06e7430f3f10b1875625e56653e10994afdc5c7fc9",
    "signature": "0xc49c3e09edc2200612826e9b1d0e80f0330305afa6943a3efa7b2294c34b87b3314bace8a10b448e3b8a2cb768565abb77fbd71af3b32057329a716e6df6219d1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}