{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf90f323432ceabace3e7d74f08c89d624ede9beba57ac43f52e6efb87869fb96",
    "signature": "0x0d7492b793d5f130e10ed3d62e442b7d587951c453c01f172c9ff113db8d604640013daf2dfd04379ead2fd367f16cc5d62e09891784f87a67377fa922d2e57b1c",
    "signer": "0xE4B0089aaFF065F7C7a0878A3DFaB65085783F85",
    "userId": "423251621"
  }
}