{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3449",
    "entityType": "User",
    "nonce": "0x9a9c56677a0775ad22158f879c298e4e7ad7951b3793fa903a7fa6970a759cdc",
    "signature": "0xe425f5e0fca0abd48dd012ac7e160747a3097dbb455e97f13656da68ff605a0b08a3988a5216046e2c00679df6391c3ffa3f55d6d460f8bb3e178eaa3b7de3251b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}