{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "876701012",
    "entityType": "User",
    "nonce": "0xa3ad5ac55e250e368bb04678592ba76343c73b989b971d6f51a89e0deab3caa8",
    "signature": "0x10e73eb22cec8653073a710318cb56e86b43610da94997fcb639009ece37e35a557236b0c85b115ad0db1602d551a853a3caddd7749744f11f49a20aa2cedea31b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}