{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "257420589",
    "entityType": "User",
    "nonce": "0x8ef2b51399687fc95658f1be826f3025b1105ff02a67aa2c41b7bcf50229c47b",
    "signature": "0x292b20017a3c568db5ebd2b413223c21ac21c8246b1c6d994c65c73da4dfe1e71d4c99ec608f3e4dfc62906de99cb52383dad5b54b263ee45a33e6f25c10db821b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}