{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "18855",
    "entityType": "User",
    "nonce": "0x6821faea171f0b782513e8f0f0544f4eb1557b4c3031aa059f114e66540b82c2",
    "signature": "0x9f32f03f3979da2fbcff72381dd4372c6b4f084d98164e6a60d3cc404f83a96258852b81a9ae37f91914620005ef0b347d43b754d3659bbaffd9e4004016c7f71b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}