{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "489783610",
    "entityType": "User",
    "nonce": "0xb9687c8c68a6e804b9756fe9c8f0e630480119b97d248dcad7d438ac1ae93280",
    "signature": "0x7a25958a2863a6eecb3ed15f53bc0ac545d70e125c61e62903664f3d18cebc9d5bc6d085ab93b1703c7c10584a15dd0e80dbc0fd6bba983ea57927355393d5031c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}