{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "325",
    "entityType": "User",
    "nonce": "0x9932d796484273a97fbf0e062f0c0857617bbdf5afb544307e3f38fc6445711f",
    "signature": "0xa8fdc9877ab004451b14560f7183b04c735523d526a4c055f700fc26d57db316543112d770045fe8e68a8d240e07a27ccf48007e6e054fe4391b917c4210c1a01c",
    "signer": "0x4950A7c498b6c214e83B79502162b7f248f9e6ed",
    "userId": "499895630"
  }
}