{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "325",
    "entityType": "User",
    "nonce": "0x538cd8ca3695d1111b130a96e4f454e3a67a3ac97c67b4bb73bf2557080c6786",
    "signature": "0x2a1b5b88443db79c53dd4e5e61e1ace1819ddcac0a2bebf290fa3b1895b0dbc33a09ada714ff3393d5f4b293940aa95dea1f9911bd804879c6ce0787e5d6bc521c",
    "signer": "0xa1962F596d0c21815F786Be31Cce30330233Cd5a",
    "userId": "653470626"
  }
}