{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "863774823",
    "entityType": "User",
    "nonce": "0x54c00c577d79d496c613ff1cd3edb2f7439e9b103fbd0e15f7e7ea22b329f089",
    "signature": "0x85bed00847e9a6123115ed8f5ce776abd1b03eddfafe3c934063ebbcd9c65bcf4a27d6ad2a392a1a18a83095f52e43167d6c001ba4c5046a9bbe88de1097dc411c",
    "signer": "0x7FCffbc9FB7516A6453F59c5b9918Ea8A7EB33eb",
    "userId": "502388335"
  }
}