{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "502706041",
    "entityType": "User",
    "nonce": "0xbb6d02cff518d9e32ff3f3db1613d9e8e4a106cfff2abacb28587e406dbc2bbd",
    "signature": "0x53b5e09f2f1c8101375b1e451935ec03b5b75ac07cb970803074bb27e6d8dfe04a3b0878b1f8a76390a7feaaea886e75cee9774f043a9f7f49af0b92287bbd281b",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}