{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x186c8c1bfa921cc345284b24c0c0ede72ec9cb12c32d4ab2b04d53fc61d66dba",
    "signature": "0xf48ff9b9fbd1ee066d04ac56901a0c1eb4e4d8951dd8a4a2c9eb893e8da3fedd3d1ffbe24f9b90dbae7dc9013238a4bf717457dc615b48879d23babb7a32b94c1b",
    "signer": "0x45C3C3C84b1FBC3f9ecD57BB3e43dE4044d3Ea3E",
    "userId": "975596375"
  }
}