{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "681863",
    "entityType": "User",
    "nonce": "0x4278cc74a585068d3647ee3aa3c353f8645d3f75fafb292dc384b22b09e5127b",
    "signature": "0x74377b3e3b734906d71eb6fbd86d30a28109bd184594bb11e5cd219d89c66b4515d8e3a2835ce771f813ad9b001a221999b04e0a2a771e26017e571d8513a3631b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}