{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "511852300",
    "entityType": "User",
    "nonce": "0x8087533a25f1251785101975a77b19c0b26612da42b1f0a5c99f4f5dcbced4e4",
    "signature": "0x0359ab6a108ddced8865d6906d7a32a3c17873c141b0bf06c83f80146f32b777262282337a5bf715f72821bf4b49440e9d5202f0f75f99824ac9567f4a3b10051b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}