{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "666711165",
    "entityType": "User",
    "nonce": "0x942bb72ad77f743f8185ad9f6fc91da2e6599fd69e0c545927ef29c9ee904229",
    "signature": "0x18705196792a4a78e5b05b613d15c007eb84d8f3ed0e04e0b56eb7ab8d2348d66d1c2dad12ef48b1016576dd1c86b5aeec2dfb301d9de0fbec65c0cd0e09e2fd1b",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}