{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc75f3540aaddce80aedd0b7403729e748f589a645cdb8ac9adcd2fbeed3db624",
    "signature": "0x23b9628af8596dc4be40d5ed20da3c4ab72bfc26f5c052b5b277f419edd1b58b6e8740a1b0cd24862adbfd5e30aba6aba6e276decb607dec13fe3c66575c5bc41c",
    "signer": "0xFBdaC5CB215cb5C9002aaA83664FfDB0e20018cD",
    "userId": "447624565"
  }
}