{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x20b6373cec10ed11c9ff2780211160376099f207d43f37b22c3bd4a00c7f32b7",
    "signature": "0xf69b2fd656f6e04073fee17d658630d407f32c28c508d8fcbe74f1f6dbeb033001df559c1bb7b921f8961d50bec387e19f4747351c72f11cfccccb811d4699511b",
    "signer": "0x773bdCC3FF748BF61b779D7884757ba28d661E4C",
    "userId": "513169940"
  }
}