{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1881054",
    "entityType": "User",
    "nonce": "0x2f46fd68a99646f678e7c7006959787f565007463badf489c4eaea6a4e7580aa",
    "signature": "0x4a352e5603e889ed259d2aec10c6b49a2ba9d75d548225c296c12f76b65b1f3e0477b691e216c977fac95875f7cd1c0269b1dfd8606c7ef3cab20472b308c0251c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}