{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4333d300ef6490f82a4cc61a7045358e39c7673a5220a9752dfe2d5b08480cb9",
    "signature": "0xd52d2b27267f128b54fa7e437d94c09fb0949a34f4b344506f7a642f0d20d1c862502b566b63801014e6ea5e4ee64b887cc5c2143a9b1aa4a8be1a985605fe871b",
    "signer": "0x674FFC02F71bdD4bD3Ae60c618579EBDD541E397",
    "userId": "787787230"
  }
}