{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0xc1f237eb38f0f748649dba989549566604004efdd992066429350141bd57c968",
    "signature": "0x9389c754b80e7dba1949c1282b3c5cc8a922c46bc1da5c368ccfc20f3e4a4cf0214f13e5db4a082c6ce3406283e716094086e78a22af28532259a7ea3f3863421b",
    "signer": "0x560CF638EEa19774538D453cC9eC0745a7C66556",
    "userId": "242603075"
  }
}