{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x57390f3ce912acb64832704e42d93971879f9f9b4c1a5d36d9db72e2123e9da9",
    "signature": "0x8b80c971b8a9f4032a30c9814cf62fd78778a043e8c9469a65cffc677c51874d033bb7c31cdd2b03c8d5da395fcad7c3a03416b1e469771bf22f08b2f02a10ac1c",
    "signer": "0xad12A53B30a86D04715B5663c5832Df6E2Cb9710",
    "userId": "980941"
  }
}