{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1880908",
    "entityType": "User",
    "nonce": "0xf6f04f8ab9a6d1165d60635cf509d928b24d459ea665f78bab728e415137f433",
    "signature": "0x9fe04c859380d6ef66ac47ab11261acc71e1562b496cf40523a16fdd8183d20e37d555c5d37ae3732f108e23425817cc487a5b835e086f02dadd8df31f4748621c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}