{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "875797218",
    "entityType": "User",
    "nonce": "0x01fa90dbae5335ad459319dc3bce09f5a1045aed6cd5937cb8f07b233d76b8ca",
    "signature": "0x5abf66f5b3ec22c15669b67df3dd1f736a26d45eaedcd9e505ece7b5e74735ef05ef1db817500b8fc306e8ea7a784977fd0558192b7dc56d4e9e00e648bc53c61b",
    "signer": "0x7cb443E1D882339Ce2Db89944ef44929E8E2F578",
    "userId": "343301"
  }
}