{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa5933538b6fcb0d0ed62a59135914a0f6628fcdb07191d4a68993a1b137136fa",
    "signature": "0xa8719e88b8db439563db75290a4f7cb8f59695b4b342d2cdc0d50bab4a68f5df54fe512ce30230b3b02ccfb6c79977bc7f0938dcfad9463c394d6724069d9d4e1c",
    "signer": "0x2e3Dc55902048e37B40b6e7DedEe665DBB018f89",
    "userId": "550798344"
  }
}