{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2599",
    "entityType": "User",
    "nonce": "0x2c2d0db1a49197fa793a7549651c6be8cec2fd2685b52322f4035e3a18868137",
    "signature": "0x6361e5f227ff1a3636c194d24ba395312adbb444cce31440e063b14725aa53246c23ca0341c0c567c72f3dfc56b583a3b5c62071dd0a7531379df8253dcd1aef1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}