{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "815537464",
    "entityType": "User",
    "nonce": "0x757d3003fb524bee013e90e8f7f77ccec29077fb91e19019c83de9b6879123bb",
    "signature": "0x69c3137b4adcfcb72d522fbaf823d8817a6de8ae5f4506f88c6e2a3b5ddb3eaf378ef38708399f18290a41e1893c6003faf200df1b525cf2747a3c82b18096471c",
    "signer": "0xD0f51E232A92DDc965FB1FE51d04200D15d10fc1",
    "userId": "536634479"
  }
}