{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "987235245",
    "entityType": "User",
    "nonce": "0xb4c2ca2c08ee4823f4ed0d385dd08a8d20b3c6054377af3ffcd8e48a7eb1966a",
    "signature": "0x8cddd0b31ace742f880436b9d27f349cc43d95e56ba56b14416e61932699920924442bb395d3fd1214c8e46f67739f5089b1716c6bd0526d057749ca0ddc6c211c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}