{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "817564020",
    "entityType": "User",
    "nonce": "0xb945475516255913799cc4c94e066912f816d74642c9841b3a6ac64c4894e4b9",
    "signature": "0xda98c2d41da957a3b2f01a6f18e20ba02510ed1043933b07b5986c4342b9b5710b213a77e7c87a9229d4e1ef4ce0b183b9e9de7906d4f9ba8cc0b11bc9f7b7f31b",
    "signer": "0xdcFFfa8EB0B3CCeBBb8F585ceF6b6dAdfAb46292",
    "userId": "468388066"
  }
}