{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301777",
    "entityType": "User",
    "nonce": "0xb038bd21162b7256f367064fb8317aa1da869ea918be2f60cca47d3ccd76758d",
    "signature": "0xee82786d9a7c3318c55f0b38e01e61ea6ea92ed4c3bd3f2daaec48dd4dd529934da80cb68bcde3bed29ad81e1c002669aca5b806ea1919f51d72799e0125d7e61c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}