{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "815537464",
    "entityType": "User",
    "nonce": "0xdcaff60fcbe1bc1d86068ee8157317eed1e4aead8c457113c34ced6038fabe9f",
    "signature": "0x6b5b90648870cfb4216adbdf3a86b2591dd4f4026b85015ab179e6575efbf12118fc70752f3013fba48abf148723cd27c326e0db129bc3f03de060b35e83c7191b",
    "signer": "0xA56552Ddf7D4d833c1B3e4f8D727B787d4D1DFFe",
    "userId": "629530515"
  }
}