{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "620307004",
    "entityType": "User",
    "nonce": "0x104dcaa11aa8215acb8cc85afb521196e8031e3273c49756272359779d33a62d",
    "signature": "0xbd1bf7f589d0abe3b2567c3c91d43b2cf02165e14c74a00667b206603a78ef8c36a3857e6bbb94160c0d48188a697fcba07f90a56a77b85ea802b4f5a1f1e11a1c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}