{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1e0673c91312651abbb65bc0b1933bc5b253380fcba607de48b8da890f1406a7",
    "signature": "0xe9f1bd8e641831933942ee74d049149fccf2f80c3858d1b83ad17a0cf1c11d2576ff322a2d07715342ecb1e6e42c40be5d6da08c97dd23a659dba425fdb7f4651b",
    "signer": "0xc9C3E808Cb827dAFd8378F0A6BAF68a755a61C03",
    "userId": "31457620"
  }
}