{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "921749721",
    "entityType": "User",
    "nonce": "0x317caaf2ae963950faf5a0336cdf9628de5dc504172afa871e484f776016cd48",
    "signature": "0xed5716b109c0ec4107fc0f5f290fb9cae71a84b0aa2959780dcc5f819551ac1c30217c1189c13efa057b4542e2d20ac0af69c04e6315679e5f4b08109910ea0e1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}