{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "50672",
    "entityType": "User",
    "nonce": "0x4c43b64b858287cdb6facbe52393fee70a9224aad5143e6ca81ea0e8c131ea9e",
    "signature": "0x7688b852229fcf52f834b8c0244ecf37d1297f59e16535b22db9136358bd4f0a779a55ee0fd518cae57f999869ab851260932e95053baaa0830d7e5a7ac85fa71b",
    "signer": "0x6124CF3cBdc678B30cAB8d4312DEAbDd093d8A91",
    "userId": "557666705"
  }
}