{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x4eef1862b892d5b0b6a936465d779cb25d8e6b5fd92423d2ec4f2b8348a89f32",
    "signature": "0x6af6979661fe4d95f5cb0c3d7ddeb5d9f942b728f9b334bef324783d48305e7c2c64b0768d71ef3c4ff8c8da7f23ec4f75331e3678bea857260dce0784d1f8631c",
    "signer": "0x354CCd2B0E100bCE4E5d0D50b46324869A16bf98",
    "userId": "491805501"
  }
}